A white blood cell (WBC) is a type of blood cell that plays a crucial role in the body's immune system. Unlike red blood cells, white blood cells do not carry oxygen but help fight infections and protect the body from diseases. They do this by identifying and attacking harmful bacteria, viruses, and other foreign invaders. White blood cells are less common than red blood cells but are essential for maintaining health. A healthy number of white blood cells is important for effectively responding to infections and other health threats.

What is a "white blood cell"?

white blood cell

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An antibody, also known as an immunoglobulin, is a specialized protein produced by white blood cells called B cells. It is a critical component of the immune system and plays a vital role in defending the body against invading pathogens such as bacteria, viruses, and other harmful substances. Antibodies recognize and bind to specific molecules on the surface of these pathogens, marking them for destruction by other immune cells or neutralizing their harmful effects. They contribute to the body's ability to mount an immune response, provide immunity against future infections, and help maintain overall health and well-being.

What is an "antibody"?

antibody

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An antigen is a foreign substance that triggers an immune response in the human body. It can be a molecule, such as a protein or a carbohydrate, that is recognized as non-self by the immune system. Antigens are often found on the surface of pathogens, such as bacteria or viruses, but can also be present on allergens or cells from transplanted organs. When the immune system encounters an antigen, it initiates an immune response to eliminate or neutralize it. This response involves the production of antibodies, activation of immune cells, and the development of immune memory. Antigens are crucial for the body's ability to distinguish between self and non-self and play a vital role in immune defense and disease recognition.

What is an "antigen"?

antigen

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A basophil is a type of white blood cell found in the human body. Basophils are part of the immune system and play a role in allergic reactions and inflammatory responses. Basophils contain granules filled with substances such as histamine, which are released when the cell is activated. When an allergic reaction occurs, basophils are involved in the immune response by releasing histamine, which triggers the dilation of blood vessels and increases their permeability. This response contributes to the characteristic symptoms of allergies, such as itching, redness, and swelling. Basophils also participate in immune defense against parasites. While they make up a small percentage of the total white blood cell count, basophils play an essential role in the body's immune response and maintaining overall health.

What is a "basophil"?

basophil

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A lymphocyte is a type of white blood cell that plays a crucial role in the immune system. Lymphocytes are responsible for recognizing and targeting foreign substances in the body, such as viruses, bacteria, and other pathogens. Lymphocytes are found in lymphoid tissues, such as the lymph nodes, spleen, and bone marrow. They contribute to both the innate and adaptive immune responses, producing antibodies, coordinating immune cell activities, and providing long-term immunity against specific pathogens. Lymphocytes are essential for maintaining overall immune function and protecting the body from infections and diseases.

What is a "lymphocyte"?

lymphocyte

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A "B lymphocyte", also known as a "B cell", is a crucial component of the immune system in the human body. They play a vital role in the adaptive immune response by producing antibodies, which are specialized proteins that help recognize and neutralize pathogens such as bacteria and viruses. B lymphocytes are generated in the bone marrow and then mature in the lymphoid organs, such as the spleen and lymph nodes. Upon encountering an antigen, B cells can differentiate into plasma cells, which secrete large amounts of antibodies, or memory cells, which "remember" the pathogen for future immune responses. B lymphocytes are essential for the defense against infections and contribute to the development of long-term immunity.

What is a "b lymphocyte"?

B lymphocyte

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A "T lymphocyte", also known as a "T cells", is a vital component of the human immune system. They are responsible for recognizing and eliminating infected or abnormal cells in the body. T lymphocytes play a crucial role in coordinating immune responses, including the activation of other immune cells and the production of cytokines. They are involved in both adaptive and innate immune responses, helping to defend the body against various pathogens and cancer cells. T lymphocytes are produced in the bone marrow and mature in the thymus gland before circulating throughout the body to carry out their immune functions.

What is a "t lymphocyte"?

T lymphocyte

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An Antigen-presenting cell refers to a diverse group of immune cells that play a crucial role in the immune response by capturing, processing, and presenting antigens to activate other immune cells, such as T cells. They help initiate and regulate immune responses, aiding in the recognition and elimination of pathogens or abnormal cells in the body. Examples of antigen-presenting cells include dendritic cells, macrophages, and B cells.

What is an "antigen-presenting cell"?

antigen-presenting cell

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Cytokine is a small protein secreted by various cells in the human body, including immune cells, and plays a crucial role in cell signaling and regulation of immune responses. They act as chemical messengers, coordinating and modulating the immune system's activities, such as inflammation, cell growth, and differentiation. Cytokines help facilitate communication between different cells and are essential for maintaining proper immune function and homeostasis in the body.

What is "cytokine"?

cytokine

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Monocyte is a type of white blood cell found in the human body that plays a critical role in the immune system. They are responsible for phagocytosis, the process of engulfing and eliminating foreign substances, and are involved in initiating immune responses and promoting inflammation. Monocytes also have the ability to differentiate into macrophages or dendritic cells, which further contribute to immune defense and regulation.

What is "monocyte"?

monocyte

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A memory B cell is a specialized type of B lymphocyte that is formed during an immune response and is responsible for maintaining immunological memory. It can recognize and quickly respond to a previously encountered antigen, leading to a faster and more robust immune response upon re-exposure to the same pathogen. A memory B cell plays a crucial role in long-term immunity and is essential for the effectiveness of vaccines and the body's ability to mount an efficient immune response against recurring infections.

What is a "memory B cell"?

memory B cell

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A memory T cell is a specialized type of T lymphocyte that develops after an initial immune response to an antigen. It retains information about the antigen and provides long-term immunity against future encounters with the same pathogen. Memory T cells are able to rapidly recognize and respond to the antigen, leading to a more efficient and effective immune response. They play a vital role in adaptive immunity, contributing to the body's ability to mount a quick and robust defense against recurring infections or reinfection with the same pathogen.

What is a "memory T cell"?

memory T cell

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A plasma cell is a mature B lymphocyte that has been activated and differentiated to produce and secrete large amounts of antibodies. These specialized cells are key players in the humoral immune response, producing antibodies that specifically recognize and neutralize antigens. Plasma cells are responsible for the production of antibodies that provide immediate defense against pathogens, toxins, and foreign substances in the body. They play a crucial role in adaptive immunity by generating a targeted immune response and helping to eliminate harmful invaders.

What is a "plasma cell"?

plasma cell

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A dendritic cell is an antigen-presenting cell that plays a crucial role in the immune system by capturing and presenting antigens to other immune cells, thus initiating and coordinating immune responses in the human body. Dendritic cells act as sentinels, patrolling various tissues, and are responsible for activating T cells and shaping both innate and adaptive immune responses. They are known for their unique ability to bridge the innate and adaptive immune systems, making them essential for effective immune defense against pathogens and the development of immunological memory.

What is a "dendritic cell"?

dendritic cell

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A granulocyte is a type of white blood cell characterized by the presence of granules in its cytoplasm. They play a vital role in the human body's immune response by defending against invading pathogens. The three main types of granulocytes are neutrophils, eosinophils, and basophils. Neutrophils are the most abundant and are highly efficient in engulfing and destroying bacteria. Eosinophils are involved in combating parasitic infections and regulating allergic responses. Basophils release chemical mediators that contribute to inflammation and allergic reactions. Together, these granulocytes work in harmony to protect the body from harmful pathogens and maintain overall immune health.

What is a "granulocyte"?

granulocyte

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Human leukocyte antigen (HLA) refers to a group of proteins present on the surface of cells that play a crucial role in the immune system. They are responsible for distinguishing the body's own cells from foreign substances, aiding in immune responses, and regulating the compatibility of organ transplantation. HLA proteins are highly diverse and contribute to individual variations in immune responses and susceptibility to certain diseases.

What is "human leukocyte antigen"?

human leukocyte antigen

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A Cytotoxic T cell, also known as a "CD8+ T cell", is a crucial component of the immune system in the human body. These specialized immune cells play a vital role in eliminating infected or abnormal cells, such as those infected by viruses or cancerous cells. Cytotoxic T cells recognize specific antigens displayed on the surface of these target cells and release toxic substances to induce cell death, effectively clearing the body of harmful pathogens and abnormal cells. Their ability to selectively target and destroy infected or transformed cells makes cytotoxic T cells essential for immune defense and surveillance against diseases.

What is a "cytotoxic t cell"?

cytotoxic t cell

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A helper T cell, also known as a "CD4+ T cell", is a crucial component of the immune system in the human body. These specialized immune cells play a central role in coordinating and regulating immune responses. Helper T cells recognize specific antigens presented by antigen-presenting cells and release signaling molecules called cytokines to activate and direct other immune cells, such as B cells and cytotoxic T cells. By providing essential instructions and support to other immune cells, helper T cells help orchestrate the immune response against infections, facilitate the production of antibodies, and enhance the immune system's ability to eliminate pathogens. Their role as mediators of immune responses makes helper T cells vital for effective immune defense.

What is a "helper T cell"?

helper T cell

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A regulatory T cell, or Treg, is a specialized type of T cell that contributes to immune regulation and prevents excessive immune responses in the human body. They play a crucial role in maintaining immune tolerance and preventing excessive immune responses. Tregs suppress the activity of other immune cells, such as effector T cells and B cells, to prevent immune system overactivity and minimize the risk of autoimmune diseases. Their ability to regulate immune responses ensures a balanced and controlled immune system function.

What is a "regulatory T cell"?

regulatory T cell

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The major histocompatibility complex (MHC) refers to a group of genes that encode proteins involved in presenting antigens to immune cells. It plays a crucial role in immune recognition and response by allowing immune cells to distinguish self from non-self. The MHC molecules are highly diverse and are responsible for initiating immune reactions and regulating immune tolerance in the human body.

What is "major histocompatibility complex"?

major histocompatibility complex

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A macrophage is an essential immune cell in the human body that engulfs and eliminates foreign invaders, such as bacteria and viruses, as well as dead cells and debris. They are part of the innate immune system and play a critical role in immune response, inflammation, tissue repair, and regulation of the immune system. Macrophages can be found in various tissues and organs throughout the body, acting as first responders to maintain health and protect against infections.

What is a "macrophage"?

macrophage

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A phagocyte is a type of immune cell in the human body that specializes in engulfing and destroying harmful microorganisms, cellular debris, and foreign particles. They play a crucial role in the innate immune response by recognizing and ingesting pathogens through a process called phagocytosis. Phagocytes include cells such as macrophages and neutrophils, and they are essential for defending the body against infections and maintaining tissue homeostasis.

What is a "phagocyte"?

phagocyte

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A mast cell is a type of immune cell present in various tissues throughout the human body, particularly in connective tissue and mucosal membranes. They play a crucial role in allergic reactions and inflammatory responses by releasing histamine and other chemical mediators. Mast cells are involved in the body's defense against pathogens and also contribute to tissue repair and remodeling processes.

What is a "mast cell"?

mast cell

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A neutrophil is a type of white blood cell found in the human body, playing a vital role in the innate immune system. It is a highly mobile cell that quickly responds to sites of infection or injury. Neutrophils are capable of engulfing and destroying pathogens through phagocytosis, releasing antimicrobial substances, and forming neutrophil extracellular traps. Their efficient response helps to control infections and maintain tissue homeostasis.

What is a "neutrophil"?

neutrophil

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A leukocyte, also known as a white blood cell, is a crucial component of the immune system in the human body. These specialized cells are responsible for defending against infections and diseases. Leukocytes circulate in the bloodstream and can migrate to tissues, where they perform various functions such as phagocytosis, antibody production, and immune regulation. They play a crucial role in the body's defense mechanisms, recognizing and eliminating pathogens, foreign substances, and abnormal cells. Leukocytes are essential for maintaining overall health and immune system function.

What is a "leukocyte"?

leukocyte

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A myeloid-derived suppressor cell is a subset of immune cells that arises from the myeloid lineage and possess immunosuppressive properties. They play a role in regulating immune responses and maintaining immune homeostasis, but their excessive accumulation or activation can contribute to immune dysfunction and disease progression. MDSCs are characterized by their ability to suppress T cell activation and promote immune tolerance, making them an important area of research in the field of immunology and cancer immunotherapy.

What is a "myeloid-derived suppressor cell"?

myeloid-derived suppressor cell

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An eosinophil is a type of white blood cell that plays a crucial role in the immune response of the human body. It is characterized by its distinct granular appearance and contains granules filled with toxic substances. Eosinophils are primarily involved in combating parasitic infections and mediating allergic reactions. They are attracted to sites of inflammation and help regulate immune responses by releasing cytokines and other signaling molecules. Eosinophils also play a role in tissue repair and can modulate the activity of other immune cells.

What is an "eosinophil"?

eosinophil

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A natural killer cell is a specialized type of lymphocyte that contributes to the innate immune response in the human body. These cells are known for their ability to recognize and eliminate virus-infected cells, as well as tumor cells. Unlike other immune cells, NK cells do not require prior activation to initiate their killing mechanisms. They identify abnormal cells by detecting changes in their surface proteins and release cytotoxic granules that induce cell death. NK cells also secrete cytokines that help regulate immune responses and coordinate the activities of other immune cells. Overall, NK cells play a crucial role in immune surveillance and defense against various pathogens and abnormal cells.

What is a "natural killer cell"?

natural killer cell

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The adenoid, also known as the pharyngeal tonsil, is a part of the lymphatic system located in the upper throat behind the nose. It plays a role in the body's immune response by helping to filter and trap bacteria and viruses that enter the respiratory system. The adenoid is most active during childhood and gradually decreases in size as a person grows older.

What is "adenoid"?

adenoid

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The tonsil refers to a pair of lymphoid tissue masses located at the back of the throat on each side. They play a role in the body's immune system by helping to trap and filter harmful bacteria and viruses that enter through the mouth and nose. The tonsils produce antibodies and immune cells to fight off infections. Although they can sometimes become infected themselves, leading to conditions like tonsillitis, the tonsils are an important part of the body's defense against pathogens.

What is "tonsil"?

tonsil

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The spleen is a large organ located in the upper left abdomen. It serves as a vital part of the immune system, playing multiple roles in the body's defense against infections. The spleen acts as a filter for the blood, removing old or damaged red blood cells and capturing and destroying bacteria, viruses, and other foreign substances. Additionally, the spleen stores and produces white blood cells and platelets, which are crucial for fighting infections and maintaining healthy blood circulation. It also plays a role in the production of antibodies and the removal of cellular debris. The spleen is an essential organ for immune function and overall health.

What is "spleen"?

spleen

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A lymph node is a small, bean-shaped organ found throughout the body, primarily in clusters along the lymphatic system. They are an integral part of the immune system, acting as filters for lymph fluid. Lymph nodes contain immune cells, such as lymphocytes and macrophages, which help detect and eliminate harmful substances, such as bacteria, viruses, and abnormal cells. When infection or inflammation occurs nearby, lymph nodes may enlarge and become tender as they work to combat foreign invaders. Lymph nodes play a crucial role in the immune response by trapping and destroying pathogens, facilitating the production of immune cells, and aiding in the coordination of immune system activities.

What is a "lymph node"?

lymph node

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A macrocyte, also known as a macrocytic red blood cell, is an abnormally large cell found in the bloodstream. They are often associated with conditions such as vitamin B12 deficiency, folic acid deficiency, or certain medications. Macrocytes can be observed under a microscope during a blood smear examination and their presence may indicate an underlying health issue. The identification of macrocytes can help healthcare professionals in diagnosing and managing the underlying cause of their appearance.

What is a "macrocyte"?

macrocyte

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A microcyte is a smaller-than-normal red blood cell that is often associated with certain types of anemia. These cells have a reduced size and may be indicative of underlying medical conditions affecting the production or maturation of red blood cells in the body. Microcytes can be observed and evaluated through a complete blood count (CBC) test and are an important parameter in diagnosing and monitoring certain hematological disorders.

What is a "microcyte"?

microcyte

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A reticulocyte is an immature red blood cell that contains remnants of ribosomal RNA. It is released into the bloodstream from the bone marrow and eventually matures into a fully functional red blood cell. Reticulocyte counts are often used to assess the rate of red blood cell production and can provide insights into various hematological conditions, such as anemia and bone marrow disorders.

What is a "reticulocyte"?

reticulocyte

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A poikilocyte refers to an atypical or irregularly shaped red blood cell characterized by its distorted morphology. These irregularities can manifest as various shapes, such as teardrop, oval, or fragmented forms. Poikilocytes are often observed in conditions associated with altered red blood cell production or destruction, such as anemias, certain genetic disorders, or certain types of infections. The presence of poikilocytes in a blood sample can provide valuable diagnostic information and may indicate an underlying health issue that requires further investigation.

What is a "poikilocyte"?

poikilocyte

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Here you will learn some English words related to the immune system, such as "antibody", "basophil", and "lymphocyte".

مدافعتی نظام

«مدافعتی نظام» کے لیے انگریزی الفاظ

The Immune System

English Words for "The Immune system"