ANT334H5 Lecture Notes - Lecture 1: Shock Absorber, Osteoid, Hyaline
Document Summary
Lecture 1: introduction to bone biology, tissue anatomy. Specialized connective tissue consisting of cells embedded within an organic gel-like substance: gel-like substance eventually becomes mineralized. Bone by weight = 22% organic, 69% inorganic, 9% water. Organic component of bone = osteoid = unmineralized collogen. The strength of the bone comes from the result of mineralization. Tissue: stores minerals, used when physiological need. 3 types of muscles: skeletal muscles, smooth muscles, and cardiac muscles. Origins = proximal end (closest to the body: on fixed elements, generally widespread. Insertions = distal end: on moveable elements, localized (on one very specific spot) Connect bones or cartilage to one another. Support and strengthen the joints: bones to cartilage whereas tendons are muscle to bone. Contain receptors that provide information about muscle tension. Consists of chondrocytes (cells) that are separated by fibres. It lacks blood supply, therefore heals much slower: lines ends of bones at joints, acts as shock absorber and stop friction of bones.
