Question

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

Explanation:

Mature compact bone's structural units are osteons. Lamellae are layers in osteons, trabeculae are in spongy bone, osteocytes are bone - cells, and canaliculi are small channels connecting osteocytes.

Answer:

osteons.