Anatomy of a Long Bone

Knobby end of the bone closer to the trunk

proximal epiphysis

• “Inside bone”

• Connective tissue membrane lining the medullary cavity

endosteum

• Hollow space in the diaphysis

• Full of yellow marrow

medullary cavity

Stores fat

yellow marrow

Shaft of the bone

diaphysis

Small hole for blood vessels to enter and exit the bone

nutrient foramen

Knobby end of the bone further from the trunk

distal epiphysis

• Arth means “joint”

• Protects the ends of long bones from wear and tear

articular cartilage

• Has spaces

• Makes up the inside of the epiphyses

• Full of red marrow

spongy bone

• Found in spongy bone tissue

• Filled with stem cells

• Creates blood cells

red marrow

• Growth plate

• Made of hyaline cartilage which ossifies and regrows repeatedly, causing growth in height

epiphyseal plate

• No spaces

• Makes up the diaphysis and outside of the bone

compact bone

• “Around bone”

• Connective tissue membrane lining the outside of the bone

periosteum