Answer:
B. lined up perpendicular to the long axis of the bone, in the direction of perforating canals.
Explanation:
Osteons are formations of concentric bone layers (lamellae) that tend to <em>run parallel to the long axis of a bone.</em> They sorround the Haversian canal, a canal that contains blood vessels that supply the osteocytes and are the structural unit of compact bone.
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Answer:
<h2>A.controlled cell division </h2>
Explanation:
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Prokaryotes do not contain membrane, and eukaryotes do contain membrane.
