Educational Requirements for Registered Nurses. Nursing students may choose from a variety of education options to become a registered nurse. Some teaching hospitals offer 3-year diploma programs in nursing; however, these programs are rare. Most RNs earn associate degrees or bachelor's degrees in nursing.
This is covered by a membrane of connective tissue called the periosteum. Beneath the cortical bone layer is a layer of spongy cancellous bone. Inside this is the medullary cavity which has an inner core of bone marrow made up of yellow marrow in the adult and red marrow in the child.
The spaces between the trabeculae are filled with redbone marrow containing the blood vessels that nourish spongy bone. Spongy bone is found in bones of the pelvis, ribs, breastbone, vertebrae, skull, and at the ends of the arm and leg bones.Joints: An articulation, or joint, is where two bones come together.edullary cavity. Bone marrow Within the long bones are two types of bone marrow: red marrow and yellow marrow. The yellow marrow has fatty connective tissue and fills the marrow cavity.During starvation, the body uses the fat in yellow marrow for energy.