Glands, hair follicles, blood vessels, and nerve endings are located here. The mites do no harm to their hosts. Skeletal System 1. Functions of Bones a. The bones are moved by muscles.
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.