BIOB32H3 Lecture Notes - Chondrocyte, Cell Division, Weight-Bearing
28 Mar 2013
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Document Summary
Skeletal cartilage: contains no blood vessels or nerves, surrounded by the perichondrium (dense irregular ct) that resists outward expansion, three types hyaline, elastic, and fibrocartilage. Elastic cartilage: similar to hyaline cartilage but contains elastic fibers, found in the external ear and the epiglottis. Fibrocartilage: highly compressed with great tensile strength, contains collagen fibers, found in menisci of the knee and in intervertebral discs. Growth of cartilage: appositional cells in the perichondrium secrete matrix against the external face of existing cartilage, interstitial lacunae-bound chondrocytes inside the cartilage divide and secrete new matrix, expanding the cartilage from within. Classification of bones: axial skeleton bones of the skull, vertebral column, and rib cage, appendicular skeleton bones of the upper and lower limbs, shoulder, and hip. Classification of bones: by shape: long bones longer than they are wide (e. g. , humerus) Classification of bones: by shape: short bones, cube-shaped bones of the wrist and ankle, bones that form within tendons (e. g. , patella)
