BIOL 205 Lecture Notes - Lecture 11: Dense Irregular Connective Tissue, Hyaline Cartilage, Bone
Document Summary
An organ system (bones, cartilage, ligaments, and other supporting bone structure) Collagen (can"t be pulled along axis but it flexible transversely), elastin (resilience), ground substance o o. Chondrocytes in lacuna(e) (when they are trapped by extracellular matrix) Avascular (difficult for blood vessels to penetrate) nutrient and waste exchanged by diffusion longer healing time o. Perichondrium outer layer of cartilage dense irregular tissue + chondroblasts. Hyaline cartilage most common (in the blue in picture) o o o. Supports soft tissue in the nose and trachea. Makes up fetal skeleton and growth plates in bone. Fibrocartilage collagen fibers in way bundles, no perichondrium o. Elastic cartilage chondrocytes with lots of elastic fibers surrounding o o. Growth patterns of cartilage - cartilage grows in two ways: Interstitial growth growth from within the cartilage itself (by activity on chondrocytes mitotically active) o o o. Appositional growth growth along the cartilage"s outside edge or periphery. Chondrocyte within lacuna begins to enter mitotic activity.
