A cell is the basic structural and functional unit that forms the foundation of all living organisms. It is the smallest unit of life capable of carrying out essential processes, such as metabolism, reproduction, and responding to stimuli. Cells have specialized structures and organelles that enable them to perform specific functions, such as the nucleus containing genetic material, mitochondria producing energy, and the cell membrane regulating the exchange of substances. Together, cells make up various tissues, organs, and systems, working harmoniously to maintain the body's structure, function, and overall health.

What is a "cell"?

cell

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cytoplasm

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centriole

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fission

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to divide

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killer cell

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meiosis

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mitosis

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A membrane refers to a thin, flexible layer of tissue that covers, lines, or separates various structures and organs. These membranes serve diverse functions, such as protecting organs, providing structural support, facilitating movement and flexibility, and allowing for the exchange of substances. Examples of membranes in the human body include the mucous membranes that line the respiratory and digestive tracts, the serous membranes that encase organs in protective fluid-filled cavities, and the cell membranes that surround individual cells, regulating the passage of molecules. Membranes are essential for the proper functioning and integration of different body systems.

What is a "membrane"?

membrane

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mitochondrion

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nucleotide

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nucleus

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protoplasm

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stem cell

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autophagy

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Tissue refers to a group or collection of specialized cells that work together to perform a specific function. Tissues can be categorized into four main types: epithelial, connective, muscle, and nervous. Epithelial tissue forms protective barriers and linings, connective tissue provides support and structure, muscle tissue enables movement and contraction, and nervous tissue facilitates communication and electrical signaling. Tissues are the building blocks of organs and systems, playing a vital role in maintaining the body's structure, function, and overall homeostasis.

What is "tissue"?

tissue

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connective tissue

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A nerve is a bundle of fibers that transmits information between the brain and spinal cord and the rest of the body. Nerves are part of the peripheral nervous system, which includes all the nerves outside of the brain and spinal cord. They consist of sensory fibers that transmit information about external stimuli, such as touch, pain, and temperature, and motor fibers that control muscle movement and glandular secretion. Nerves are essential for communication between the brain and the body and are responsible for the regulation of many bodily functions. Damage to nerves can cause sensory and motor dysfunction, leading to conditions such as paralysis, pain, and numbness.

What is a "nerve"?

nerve

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A neuron, also known as a nerve cell, is a specialized cell that is the fundamental unit of the nervous system. Neurons are responsible for transmitting information throughout the body, allowing us to think, feel, and move. They have a unique structure that includes dendrites, a cell body, and an axon. Dendrites receive signals from other neurons, while the cell body processes this information. The axon, which can be very long, carries electrical impulses away from the cell body and towards other neurons, muscles, or glands. Communication between neurons occurs through synapses, small gaps between the axon of one neuron and the dendrites of another.

What is a "neuron"?

neuron

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An axon is a long, thin, and cylindrical extension of a neuron that transmits electrical signals away from the cell body to other neurons, muscles, or glands. It is a crucial part of the nervous system and is fundamental to communication between neurons. The axon is covered in a protective layer of myelin, which helps to increase the speed and efficiency of signal transmission. In some cases, axons can range in length from a few millimeters to over a meter. At the end of the axon are small branches called axon terminals that form synapses with other neurons or target cells, allowing for the transmission of signals across the synapse. The complex network of axons and synapses is essential for learning, memory, perception, and other cognitive processes in the brain.

What is an "axon"?

axon

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dendrite

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receptor

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organelle

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ribosome

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lysosome

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vacuole

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Golgi apparatus

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cell cycle

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apoptosis

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cytoskeleton

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Study terms related to cell structures, organelles, division, cellular processes, tissues, and the organization of nerve cells.

Cellular Biology

"Cellular Biology" in English Vocabulary