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.
cranial cavity the space enclosed by the bones of the cranium. glenoid cavity a depression in the lateral angle of the scapula for articulation with the humerus. marrow cavity (medullary cavity) the cavity that contains bone marrow in the diaphysis of a long bone; called also medullary canal.lenoid cavity a depression in the lateral angle of the scapula for articulation with the humerus. marrow cavity (medullary cavity) the cavity that contains bone marrow in the diaphysis of a long bone; called also medullary canal.