Question

the structural units of mature compact bone are called
lamellae.
trabeculae.
canaliculi.
osteons.
osteocytes.

Explanation:

Lamellae are layers in bone. Trabeculae are in spongy bone. Canaliculi are tiny canals. Osteocytes are bone - cells. Osteons are the structural units of mature compact bone.

Answer:

osteons.