BIOL 240 Lecture Notes - Lecture 7: Ancient Warfare, Sesamoid Bone, Chondrocyte
Document Summary
Adult body has 206 bones with variations. Sutural (wormian) bones: extra bones within sutures of skull, which can be markers for diseases (e. g. down syndrome) Sesamoid bones: bones that develop from tendons (patella) Consists of the bones, cartilage, ligaments, and other connective tissue. Matrix: has many sugar molecules, 80% water. Chondrocytes and lacunae: cells and spaces holding them. Support and withstand deformation: nose, ears. Perichondrium: layer covering cartilage, not found in fibrocartilage or articular cartilage, consists of external and internal layers, external made of. All have chondrocytes surrounded dense irregular tissue by a lacuna. Hyaline cartilage: most abundant, supports soft tissue, mostly composed of water, weakest of three, perichondrium present, fetal skeletal, will go through hyaline cartilage and then transform into bones. Elastic cartilage: perichondrium not present, contains numerous elastic fibers in matrix, ear, epiglottis, very flexible. Fibrocartilage: dense collagen fibers, found in intervertebral discs, pubic symphysis, meniscus, perichondrium not present, find it in.
