How do the joints work?

Collectively, the meeting point of two or more legs and the function of the legs can move and make the movement between the legs smooth and safe, but how do the joints work? How do the joints work? There are many types of joints in the human body, and each type has a specific function in the body, but generally the joints move the bones attached to it. The bones move due to the effective reaction between the joints and the nerve and muscle parts that move, and the importance of this reaction is in addition to the movement of the muscle skeleton system by spreading mechanical pressure between the tissue of the joint itself, so that any damage to the joints can lead to the legs and thus the cartilage to the joint and the joints work. is to maintain the balance of all the joint tissue with the synovial fluid, so that the bone connection with the joint is strong enough to install it, while maintaining the flexibility and relative softness that can make the bones move smoothly. The direction of the joint movement and the extent of its expansion depends on the shape of the surface of the joint, the muscles and ligaments around it, for example that you can only bend your knees to a certain point because the back of the thigh and the leg presses against each other in the direction. Another example of the hip joint that allows the tribe to move back to a certain point, because the ligament in the thigh prevents it from moving to more than this point. 2.. Sumatic absorption, peaceful joints absorb shocks as you hit the ground; You will not experience severe pain in your knee because the cartilage around the joint and the synovial fluid containing protein and sugar produced by the cells containing the joint works to take up shocks and slow down their power, and then transfer it from bone to another, such as pressure on a cruel and then gradually empty the energy. The components of the joints and their role in the work of the joint. These components of the joint: cartilage is a smooth substance that forms the tips of the bones when you meet with the joint, its function is to take up shocks and prevent damage to the bones that enclose it. Muscles are strong tissues that connect the bones to each other, and their function is to provide the bones to the power needed for their movement. Ligaments are strong tissues that also connect bones with each other, and the outer lid of the joint is formed. The synoviocites are specialized cells that make up the inner layer of the joint, fill the joint with a thin layer of synovial fluid, and its function is shock absorbers and prevents bone damage. Bursa is bags full of liquid around the joint, which occurs friction between the skin and the joint, and between two legs and between a tendon or strap with the bone. The types of joints classify the joints in different types, including: the histological classification and contains the following types: the fiber fiber joint (immovable fiber joint): Two or more bone contacts, which are for example and are not animated; Skull bones. Slightly movable cartilage joint: Two or more bone connectivity, such as vertebrae of the spine. Freile movable synovial joint: It contains most of the human body connections. The functional classification contains the following species: The hinge joint: It allows movement in one direction, such as the joints of the elbows and the knee. Pivot joint: It is allowed to turn and turn, as in the head. Ball-accet joint: The movement is freely allowed, as in the thighs and shoulders.