Bones protect vital organs such as brain and lungs. The bones support and anchor muscles. Bone tissue acts as a depository for calcium, phosphorus, and other ions. Parts of some bones are sites of red blood cell production. How Bones Develop a.
Osteoblasts secrete material inside the shaft of the cartilage model of long bones.
Skeletal Structure 1. The appendicular skeleton consists of the pectoral girdle with attached upper limbs, and the pelvic girdle with lower limbs. How Muscles and Bones Interact 1. The skeleton and muscles operate like a system of levers. Because most muscle attachments are located close to joints, only a small contraction is needed to produce considerable movement of some body part.