Bone tissue comprises cortical bone and cancellous bone, although bones may also contain other kinds of tissue including bone marrow, endosteum, periosteum, nerves, blood vessels, and cartilage. In the human body at birth, approximately 300 bones are present.
Bone is a rigid body tissue consisting of cells embedded in an abundant hard intercellular material. Bone tissue makes up the individual bones of the skeletons of vertebrates. Its two principle components are collagen and calcium phosphate.
Bones form the scaffolding that hold the body together and allow it to move. They also help protect vital organs, store minerals, and provide an environment for creating bone marrow. By...
Bones are classified by their shape. They may be long (like the femur and forearm), short (like the wrist and ankle), flat (like the skull), or irregular (like the spine). Primarily, they are referred to as long or short. There are 206 bones in the adult human skeleton.
Explore the skeletal system with our interactive 3D anatomy models. Learn about the bones, joints, and skeletal anatomy of the human body. Ready for the ultimate sleep upgrade? Your privacy is important to us. The skeletal system includes all of the bones and joints in the body.
Each bone has two types of bone tissue to ensure strength: The dense, hard outer layer is called compact or cortical bone while the inner, less dense, lattice-like bone is called cancellous, trabecular or spongy bone that is surrounded by bone marrow.
Bone tissue (osseous tissue) differs greatly from other tissues in the body. Bone is hard and many of its functions depend on that characteristic hardness. Later discussions in this chapter will show that bone is also dynamic in that its shape adjusts to accommodate stresses.