bone tissue

Question 1

1) Osteon (aka Haversian system)

2) Central canal (aka Haversian’s canal)

Answer 1

• the microscopic structural unit of compact bone composed of rings of calcified matrix called concentric lamellae (singular = lamella) surrounding a central opening called central canal.
• longitudinal channel in the center of each osteon; contains nerves, blood and lymphatic vessels.

Question 2

3) Concentric Lamellae

4) Circumferential Lamellae

5) Interstitial Lamellae

Answer 2

• rings of calcified matrix surrounding the central canal
• layers of calcified matrix surrounding the entire bone (around the circumference of bone)
• ocalcified matrix that fills the space between osteons

Question 3

6) Lacuna

Answer 3

a space in the bone tissue found at the borders of adjacent lamellae and housing the osteocytes (plural - lacunae)

Question 4

7) Osteocyte

Answer 4

• a mature bone cell with processes; located in lacuna

Question 5

8) Volkman’s Canal (aka perforating canal)

Answer 5

• a horizontal channel with branches of nerves, blood and lymphatic vessels

Question 6

9) Endosteum

10) Periosteum

Answer 6

• a delicate membranous lining the medullary cavity, where bone growth, repair, and remodeling occur.
• a fibrous membrane covering the outer surface of bone; contains nerves, blood and lymphatic vessels; place of attachment for tendons and ligaments

Question 7

11) Sharpey’s Fibers

Answer 7

• connective tissue fibers that attach periosteum to bone

Question 8

12) Canaliculi (singular = canaliculus)

Answer 8

• tiny channels within the matrix that house cytoplasmic processes of osteocytes allowing them to communicate with each other and receive nutrients