BIOL 30100 Lecture Notes - Lecture 5: Fibrocartilage Callus, Hyaline Cartilage, Medullary Cavity
Document Summary
Bone: is made up of bone, cartilage, dense connective tissue, epithelial tissue, adipose tissue and neurons. It is a dynamic system as it is continuously being broken down and repaired. Bone is made up of 15% water, 30% collagen fibers, 55% crystallized mineral salts (calcium phosphate) Function: supports soft tissue and provides the framework to which muscles are attached. Protection: skull protects the brain, the rib cage protects the lungs and heart, vertebral column protects the spinal cord. Movement: happens because of the skeletal muscle pulling on bone. Mineral and growth factor storage: calcium phosphate and many other salts. Igf (insulin like growth factor) tgf (tissue growth factor) stored in bone. Blood cell production: bone marrow resides inside the bone. In adults red bone marrow is present in flat bones and ends of long bone, but in kids it is everywhere. Stores fat: when we become adults, we store fat in bones. Breaking down of bone and building it again.
