The Skeletal System: Bone Tissue

Question 1

Osteoprogenitor cells

Answer 1

Divide to produces osteoblasts; are stem cells

Question 2

Osteoblast

Answer 2

Produce bone; build Ca++ crystals; no division

Question 3

Osteocytes

Answer 3

Mature cells that maintain healthy bone; no division; no secret matrix

Question 4

Osteoclast

Answer 4

Dissolve bones; dissolve Ca++ mineral salts (matrix contains abundant salt minerals)

Question 5

Compact bone

Answer 5

Contains few spaces and is the strongest type of bone tissue. It provides protection and support. Each osteon consists of concentric bone lamellae arranged around an osteonic (haversian or central) canal.

Question 6

Perforating canals

Answer 6

Blood vessels and nerves from the periosteum penetrate the compact bone through transverse perforating canals. The vessels and nerves of the canal connect with the medullary cavity, periosteum, and osteonic canals.

Question 7

Concentric lamella

Answer 7

Rings of solid Ca++ salts arranged around one another

Question 8

Lacunae (osteocytes)

Answer 8

Between the concentric bone lamellae are small spaces called bone lacunae. Inside each lacunae is an osteocyte.

Question 9

Bone canaliculi

Answer 9

Contain extracellular fluid; transport nutrients and waste; spongy tissue - no osteons

Question 10

Trabeculae

Answer 10

Irregular arrangement of thin bone plate