Skeletal+HW-PK

//**Skeletal Homework by Patricia Kelley**//



- The bone is composed of a medullary cavity, articular cartilage and the periosteum,
 * (1) A bone is an organ composed of what types of tissues? (Be detailed, pictures nice)**

- The bone is composed of a medullary cavity, articular cartilage and the periosteum,
 * (2) Describe the make up of LONG bone. DESCRIBE**

- The types of cells are osteoblasts (bone-forming), osteocytes (maintain bone bells) and osteoclasts (bone absorbing cells).
 * (3) What types of cells are involved in bone growth, remodeling, and repair? DESCRIBE**

- Two types are intramembranous (these cells secret the organic matrix of bone which promote calcification) and endochondral (bone replaces the carilaginous models of the bone).
 * (4) What are two types of ossification. DESCRIBE.**



- The four steps are...
 * (5) What are the four steps required in fracture repair? DESCRIBE.**
 * 1) Hematoma: After a fracture, blood escpaes from ruptered blood vesels and forms a mass of clotted blood in between the broken bones for six to eight hours.
 * 2) Fibrocartilaginous callus: Tissue repair begin and a fibrocatilaginous callus fills the space between the ends of the broken bone for about three weeks.
 * 3) Bony Callus: Osteoblasts produce trabeculae of spongy bone and convert the fibrocartilage callus to a bony callus that joins the broken bone for six to eight weeks.
 * 4) Remodeling: Osteoblasts build new compact new compact bone at the periphery and osteoclasts absorb the spongy bone, creating a new meullary cavity.

- The skeleton supports the body, protects soft body parts. produces blood cells and permits flexibility.
 * (6) What are the functions of the skeleton?**

- Joints are classified as fibrous, cartilaginous or synovial connective tissue.
 * (7) How are joints classified?**

- Types of Synovial joints are elbow and knee joints. Types of movements are flexion, extension, abduction, rotation, cirumduction, eversion and inversion.
 * (8) Give examples of different types of synovial joints and the movements they permit.**