cortical (compact) bone - made of a dense regular arrangement of osteons (Haversian systems). Compact bone is found in the diaphysis (shaft) of long bones and as the outer layer of all bones.
	cancellous (spongy) bone - Consists of trabeculae (a network) of thin, connecting spicules which form a meshwork in the interior of bones. Spaces between the trabeculae contain marrow and blood vessels.