Which type of cell gives rise to osteoblasts?   Multiple Choice   Haversian cell   Osteogenic cell   Monocyte   Lymphocyte   Osteoblast

In young and growing people, the osteoclasts become more active than osteoblasts resulting in gradual decrease in bone. False true

A fracture heals by bone being rebuilt. True or False

Osteoarthritis refers to _______.   A inflammation of the joints due wear and tear on the cartilage with aging   B bone pain caused by an autoimmune disease that destroys osteons   C a decrease in bone mineral density due to insufficient dietary calcium and vitamin D   D microfractures in vertebrae caused by excessive osteoclast activity

Describe the three types of cartilage and tell me why injuries to cartilage heals very slowly.