Question

page 77, question 10

identify the numbered structures on the picture.

1.
2.
3.
4.

Explanation:

Identify central canal

Label 1 points directly to the dark, circular opening at the center of an osteon (Haversian system). This central space contains blood vessels and nerves.

• Central canal (or Haversian canal)

Identify osteon boundary

Label 2 points to the outer boundary of a single functional unit of compact bone, which is a concentric ring system.

• Osteon (or Haversian system)

Identify concentric layers

Label 3 brackets the concentric rings of matrix surrounding the central canal.

• Lamellae (specifically concentric lamellae)

Identify small cavities

Label 4 points to the small, dark, spider-like spaces containing osteocytes.

• Lacunae (singular: lacuna)

Answer:

Identify the numbered structures on the picture.

1. <blank>Central canal</blank>
2. <blank>Osteon</blank>
3. <blank>Lamellae</blank>
4. <blank>Lacunae</blank>