NSE 13A/B Chapter Notes - Chapter 24: Anterior Superior Iliac Spine, Posterior Superior Iliac Spine, Synovial Joint
Document Summary
Produce red blood cells in bone marrow (hematopoiesis) Reservoir for storage of essential minerals (i. e. calcium and phosphorus) Bone is hard, rigid, and very dense. Joint: place of union of two or more bones: functional units of the musculoskeletal system, enable the mobility needed for activities of daily living. Immovable: bones are united by fibrous tissue or cartilage. Synovial joints: freely movable, bones that are separated from each other and are enclosed in a joint cavity. Cavity is filled with synovial fluid (a lubricant: a layer of resilient, avascular cartilage covers the surface of opposing bones, surrounded by a fibrous capsule and is supported by ligaments. Ligament: fibrous bands running directly from one bone to another that strengthen the joint and help prevent movement in undesirable directions. Bursa: enclosed sac filled with viscous synovial fluid; located in areas of potential friction (e. g. shoulder, knee) and help muscles and tendons glide smoothly over bone. Account for 40%-50% of the body"s weight.
