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Etymology: AS, ban, bone, lamella, plate
a thin plate of bone matrix, a basic structural unit of mature bone.
Plates of collagen fibers, 3 to 7 µm thick, found in secondary (mature, adult) bone and surrounded by cementing substance, the mineralized bone matrix. Some lamellae are parallel to each other. Other lamellae are aligned concentrically around a vascular canal — a structure known as a haversian system or osteon.
See also: lamella