BLG 10A/B Lecture Notes - Lecture 6: Dense Irregular Connective Tissue, Endochondral Ossification, Intramembranous Ossification
18 Mar 2014
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Document Summary
Includes: articular cartilages costal cartilages respiratory cartilages nasal cartilage: elastic cartilage look like hyaline, but contain more elastic fibers (bending, fibrocartilages highly compressible, great tensile strength(intermediate b/w hyaline & Functions of bones: support, protection, movement, mineral & growth factor storage, blood cell formation hematopoiesis, triglyceride (fat) storage. External surface of bones have projections, depressions, openings that serve as sites of muscle, ligament and tendon attachment bone markings. External layer is compact bone, and internal layer is spongy bone (honeycomb of trabeculae) In living bones, open spaces b/w trabeculae are filled with red/yellow bone marrow. Structure of a typical long bone: diaphysis. Constructed of thick collar of compact bone that surrounds a central medullary cavity. In adults, medullary cavity contains fat & is called yellow marrow cavity: epiphysis. Bone ends; exterior = compact & interior = spongy. Joint surface covered with a thin layer of articular cartilage which cushions opposing bone ends.
