Bone Anatomy

Diaphysis

Shaft, or middle section, of a long bone

Epiphysis

The enlarged end of the bone.

Articular cartilage

Thin layer of hyaline cartilage located on the distal and proximal epiphysis of the bone.

Periosteum

Tough layer of fibrous connective tissue that surrounds the bone and is continuous with tendons and ligaments

Medullary Cavity

Hollow space within the diaphysis, which contains the yellow marrow.

Endosteum

Thin layer of cells lining the medullary cavities and the trabeculae of spongy bone inside the bone

Red marrow

Located within the spongy bone and is involved in blood cell formation (hematopoiesis)

Yellow marrow

Located in the medullary cavity and functions as a fat storage area

Compact bone

Layer of protective hard tissue that is composed of repeating units of osteons

Spongy bone

Mesh-like tissue made of interconnecting trabeculae and spaces filled with red marrow

Epiphyseal plate

A band of hyaline carilage found between the diaphysis and epiphyses of long bones during childhood and adolescence; area where bone increases in length

Articular cartilage (image)

What is B?

Periosteum (image)

What is F?

Epiphyseal plate (image)

What is D?

Endosteum (image)

What is E?

Spongy bone (image)

What is E?

Compact bone (image)

What is H?

Medullary cavity (image)

What is I?

Diaphysis (image)

What is B?

Yellow marrow (image)

What is 2?

Red marrow (image)

What substance fills the spaces of E?

Epiphysis (image)

What is A?

Osteon

structural unit of compact bone which resembles rings of a tree

central canal

canal that houses blood vessels and nerves, located at the center of the osteon

Lacunae

small cavities in bone that contain osteocytes

Canaliculi

Hairlike canals that connect lacunae to each other and the central canal

Lamellae

Concentric rings of bone matrix

osteocyte

mature bone cell, direct activities of other bone cells

osteoblasts

cells that build bone matrix

osteoclasts

cells that break down bone matrix

Hematopoeis

blood cell formation