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A type of tissue found in animals whose main function is binding other tissue systems (such as muscle to skin) or organs; it consists of the following three elements: cells, fibers, and a ground substance (or extracellular matrix).
A viscous, non-Newtonian fluid found in the cavities of synovial joints. With its yolk-like consistency ("synovial" partially derives from ovum, Latin for egg), its principal role is to reduce friction between the articular cartilage of synovial joints during movement.
A tough band of inelastic fibrous tissue that connects a muscle with its bony attachment.
To protect the knee and reduce friction from the various muscles, tendons, and ligaments that attach to and cross the knee joint, knees are cushioned by 14 different bursae: five in front, four laterally, and five medially.
Synovial joints are made up of five classes of tissues. These include bone, cartilage, synovium, synovial fluid, and tensile tissues composed of tendons and ligaments. The synovial lining in the bursae and tendon sheaths is similar to that within joints, with a slippery non-adherent surface allowing movement between planes of tissue. Synovial tendon sheaths line tendons only where they pass through narrow passages or retinacula, as in the palm, at the wrist, and around the ankle. Elsewhere the tendon lies in a bed of loose fibrous tissue. Bursae occur at sites of shearing in subcutaneous tissue or between deeper tissues such as muscle groups and fascia. Many bursae develop during growth but new or adventitious bursae can occur at sites of occupational friction.
A tendon (or sinew) is a tough band of fibrous connective tissue that usually connects muscle to bone and is capable of withstanding tension. Tendons are similar to ligaments and fasciae as they are all made of collagen, except that ligaments join one bone to another bone, and fasciae connect muscles to other muscles. Tendons and muscles work together.
A bursa (plural bursae) is a small fluid-filled sac lined by synovial membrane with an inner capillary layer of slimy fluid (similar in consistency to that of a raw egg white). It provides a cushion between bones and tendons or muscles around a joint. This helps to reduce friction between the bones and allows for free movement. Bursae are filled with synovial fluid and are found around most major joints of the body such as the shoulder and the knee.
bursae help reduce friction between bones at synovial joints, tendon sheaths with their synovial membrane allow slippery movement in narrow passages in the palm, tendon sheaths are composed of loose, fibrous tissue that wraps the tendon around synovial joints, or bursae are fluid-filled sacs found around synovial joints