Bone structure and physiology

Bone - ANSWER-One of hardest connective tissues when fully developed It's a mineralised tissue 30% organic material 45% inorganic material What's bone composed of - ANSWER-Living cells embedded in a mineralised extracellular matrix What does hydroxyapatite do - ANSWER-Provide strength What's function of bone - ANSWER-Support the body and protect internal organs Allows movement Haematopoiesis Calcium homeostasis Haematopoeis - ANSWER-Production of blood cells Different types of bones - ANSWER-Cortical/compact/laminar Trabecular/cancellous Woven bone Cortical/compact/laminar - ANSWER-Approx 80% of skeleton, dense, very strong forms the outer layer of all bones Trabecular/ cancellous - ANSWER-Porous mesh work of bone Make up approx 20% of the skeleton mainly in axial skeleton Bone strength also determined by the trabecular microstructure can change in disease eg osteoporosis Woven bone - ANS