Structure of the bone: Long bone Anatomy

Question 1

Makes up most of bone’s length.
Composed of compact bone.

Answer 1

Diaphysis

Question 2

Outside covering of the diaphysis.

Fibrous connective tissue membrane.

Perforating (Sharpey’s) fibers secure periosteum
to underlying bone

Answer 2

Periostuem

Question 3

Composed mostly of spongy bone enclosed by
thin layer of compact bone

Answer 3

Epiphysis

Question 4

Covers the external surface of the epiphyses

Made of hyaline cartilage

Decreases friction at joint surfaces

Answer 4

Articular Cartilage

Question 5

Remnant of the epiphyseal plate
Seen in adult bones

Answer 5

Epiphyseal lines

Question 6

Flat plate of hyaline cartilage seen in young, growing bone

Causes lengthwise growth of a long bone

Answer 6

Epiphyseal Plate

Question 7

Lines the inner surface of the shaft
Made of connective tissue

Answer 7

Endosteum

Question 8

Cavity inside the shaft

• Contains yellow marrow (mostly fat) in adults
• Contains red marrow for blood cell formation in
  infants until age 6 or 7

Answer 8

Medullary Cavity