Joints space cushioned by little fluid-filled sacs referred to as bursae and also stabilized by challenging bands of fibrous connective tissue referred to as tendons.
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Key PointsSynovial joints are made up of five classes the tissues. These include bone, cartilage, synovium, synovial fluid, and also tensile tissues composed of tendons and also ligaments. Tendons are challenging bands the fibrous connective tissue that connect muscles come bones. Bursae space sacs filled with synovial fluid that administer cushioning roughly a joint in between the bones and the muscles and tendons cross the joint.
Key Termsretinacula: A band approximately tendons the holds castle in location for stabilization. tendon: A difficult band of inelastic fibrous tissue that associate a muscle with its bony attachment. synovial fluid: A viscous, non-Newtonian fluid found in the cavities of synovial joints. Through its yolk-like consistency, the principal function is to mitigate friction in between the articular cartilage the synovial joints during movement. connective tissue: A type of tissue found in animals that attributes in binding other tissue equipment (such as muscle come skin) or organs. It consists of the cells, fibers, and a ground substance or extracellular matrix.
Synovial joints are comprised of 5 classes that tissues: bone, cartilage, synovium, synovial fluid, and also tensile tissues written of tendons and ligaments. The synovial lining in the bursae and also tendon sheaths, similar to the within joints, is a slippery, non-adherent surface allowing movement between planes of tissue. Synovial tendon sheaths heat tendons just where castle pass v narrow passages or retinacula, together in the palm, in ~ the wrist, and around the ankle. Elsewhere, the tendon lies in a bed of loosened fibrous tissue.
Tendons: Illustration of the location of tendons in the hand
A tendon or sinew is a hard band that fibrous connective organization that generally connects muscle to bone and is qualified of withstanding tension. Tendons are similar to ligaments and fasciae together they space all make of collagen, yet a ligament join one bone to another and fasciae connect muscles to various other muscles. Tendons affix muscle to bone and move the skeleton or structures to which they are attached.
A bursa (plural bursae) is a small, fluid-filled sac lined by synovial membrane through an inner capillary class of fluid (synovial fluid) v the consistency of raw egg white. It provides a cushion in between bones and tendons or muscles around a joint. This help to reduce friction between the skeletal and enables for complimentary movement.
Bursae occur at sites of shearing in subcutaneous organization or between deeper organization such together muscle groups and also fascia. Numerous bursae build during growth, but brand-new or adventitious bursae can occur at website of job-related friction. Bursae are found roughly most major joints of the body, such together the shoulder and the knee. Because that example, to safeguard the knee and reduce friction indigenous the miscellaneous muscles, tendons, and ligaments that affix to and also cross the knee joint, knees are cushioned by 14 different bursae: five in front, four laterally, and five inter-base.netially.
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Knee joint: diagram of the knee joint.
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