Question

Which of the following statements is not correct?

A. the small cavities in bone tissue where osteocytes are found are called lacunae.
B. the haversian canal that runs through the core of each osteon contains blood vessels and nerve fibers.
C. bone cells within lacunae receive nourishment from blood vessels through passageways called canaliculi.
D. an osteon is a mature bone cell

Answer 1

The incorrect statement is D, which suggests that an osteon is a mature bone cell. An osteon is actually the structural unit of compact bone, not a cell, while the mature bone cells are called osteocytes and are found in the lacunae, nourished through canaliculi.

Step-by-step explanation:

The statement that is not correct is D. “An osteon is a mature bone cell.” An osteon, also known as a Haversian system, is not a cell but a structural unit of compact bone composed of concentric rings of calcified matrix called lamellae, which surround a central canal (Haversian canal) containing blood vessels and nerve fibers. The actual mature bone cells, known as osteocytes, are found within spaces called lacunae, which are located at the edges of adjacent lamellae. Nutrients are transported to the osteocytes through tiny channels called canaliculi, which connect the lacunae to each other and eventually to the central canal.

The other statements are correct: A. describes the lacunae where osteocytes reside; B. identifies the contents of the Haversian canal; and C. explains how bone cells receive nourishment through canaliculi.