Question

question 2
haversian systems or osteons:
a are avascular
b do not contain osteocytes
c lack concentric lamellae
d are found in spongy bone tissue
e are the basic units in compact bone tissue

Explanation:

• Haversian systems (osteons) have blood vessels (so A is wrong).
• They contain osteocytes (so B is wrong).
• They have concentric lamellae (so C is wrong).
• They are in compact bone, not spongy bone (so D is wrong).
• Osteons are the basic units of compact bone tissue.

Answer:

E. are the basic units in compact bone tissue