How do blood vessels penetrate into the inner structures of the bone?
a. Volkmann canals
b. Canaliculi
c. Sharpey fibers
d. Lamellae
ANS: A
The outer layer of the periosteum contains blood vessels and nerves, some of which penetrate to the inner structures of the bone through channels called Volkmann canals. Canaliculi are small channels or canals. Sharpey fibers also help hold or attach tendons and ligaments to the perios-teum of bones. Concentric layers of bone matrix are called lamellae.
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