Modified long bones: These bones either have modified shaft or ends. They have no medullary cavity which is present in the typical long bones. Examples of this class of bones are clavicle and body of vertebrae.Click to see full answer. Likewise, people ask, do all bones have a medullary cavity?Located in the main shaft of a long bone (diaphysis) (consisting mostly of compact bone), the medullary cavity has walls composed of spongy bone (cancellous bone) and is lined with a thin, vascular membrane (endosteum). However, the medullary cavity is the area inside any bone (long, flat, etc.)Subsequently, question is, what is found in the medullary cavity of adults? In adults, the medullary cavity contains fat (yellow marrow) and is called the yellow marrow cavity. 1. The medullary cavity is surrounded by a thick collar of compact bone in the diaphysis. Just so, what surrounds the medullary cavity? The periosteum is a layer of fibrous tissue that covers the bone. Compact bone is the dense, hard, smooth outer part of a bone. It surrounds the medullary cavity and contains blood vessels and nerves. Cartilage covers the end of bones.Why do long bones have a medullary cavity?Long bones all have a long cavity inside the diaphysis called the medullary cavity. This cavity is filled with red bone marrow in children, which transitions to yellow bone marrow as they grow to become adults. For this reason the medullary cavity is also called the marrow cavity.
