单元 7 - 7C

A comb is a personal care tool with evenly spaced teeth or bristles that is used to detangle and style the hair. It helps to remove knots, distribute hair products, and create desired hairstyles by smoothly running through the strands. Combs come in various sizes, materials, and designs, offering versatility and convenience for different hair types and styling needs.

An elbow is a pivotal joint connecting the upper arm to the forearm, allowing for essential movements and actions. It functions as a hinge joint, enabling flexion and extension, as well as a pivot joint, facilitating rotation of the forearm. The elbow joint consists of bones, ligaments, tendons, and muscles, working together to provide stability and mobility. It plays a crucial role in activities such as bending the arm, lifting objects, and performing various tasks that require forearm movement. The elbow is an integral part of the upper limb, enabling us to engage in a wide range of everyday activities with precision and control.

A gymnasium is a large indoor facility used for physical activities and sports, such as basketball, volleyball, and gymnastics. It typically features a hard floor or specialized surface, and may include equipment like basketball hoops, volleyball nets, and gymnastic apparatus. Gymnasiums are commonly found in schools, universities, and fitness centers, serving as a space for physical education classes, sports practices, and recreational activities. Some gymnasiums also host events, such as competitions, performances, and community gatherings.

The knee is a joint connecting the thigh bone (femur) to the shin bone (tibia). It is a hinge joint that allows for the bending and straightening of the leg. The knee is supported by ligaments, tendons, and muscles that provide stability and enable various movements such as walking, running, and jumping. It acts as a shock absorber and plays a crucial role in weight-bearing activities. The knee joint is essential for overall lower limb function and mobility, and understanding its anatomy and function is important for maintaining proper knee health and preventing injuries.

A limb is an anatomical term that refers to the appendages or extremities of the human body, including the arms and legs. These structures provide mobility, dexterity, and support for various physical activities. The limbs are composed of bones, muscles, tendons, and joints that work together to facilitate movement and perform tasks such as grasping, walking, running, and manipulating objects. Each limb consists of several segments, such as the upper arm, forearm, hand, thigh, leg, and foot. The limbs are vital for locomotion, balance, and interaction with the surrounding environment, playing a crucial role in daily activities and overall physical function.

A massage is a therapeutic practice involving the kneading or pressing of muscles and soft tissues of the body. It is typically performed with hands, fingers, elbows, or mechanical devices to help relaxation, relieve tension, and improve circulation. Massage therapy can be used to ease muscle pain, reduce stress and anxiety, improve flexibility, and encourage overall well-being. Different techniques and pressures are applied based on individual needs and preferences. Massages are widely used in both medical and wellness settings to support physical and mental health.

The thumb is the first digit of the hand, located on the side opposite the fingers. It is characterized by its ability to oppose the other fingers, allowing for precision gripping and manipulation. The thumb plays a crucial role in fine motor skills, such as writing, picking up small objects, and performing intricate tasks. It provides stability and strength to the hand, enabling a wide range of movements and dexterity. The thumb's unique structure and mobility are essential for everyday activities and tool usage. Understanding the anatomy and function of the thumb is important for hand coordination, grip strength, and overall hand functionality.

A toe is one of the five digits on the foot, located at the end of the foot opposite the heel. It plays a crucial role in maintaining balance and providing support during standing, walking, and running. Each toe consists of bones, joints, muscles, and ligaments that enable movements such as flexion, extension, and gripping. The toes also help with propulsion and shock absorption during walking, distributing the body's weight evenly. Understanding the anatomy and function of the toes is important for proper foot mechanics, stability, and overall lower limb health.