Bone tissue types - compact and spongy

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HWC

Bone tissue types • There are two types of bone tissue: compact and spongy. • All the bones of the skeleton have both kinds of bone tissue. • Compact (dense) bone • Arranged in osteons (Haversian systems), units of lamellae laid down in adjoining series of concentric rings. • Protective and supportive along the horizontal axis. • Found in areas that need strength. • Spongy (cancellous) bone • Lamellae arranged in branching columns called trabeculae. • Spaces between trabeculae are filled with either red or yellow marrow. • Found in areas where stress is applied from many directions such as the epiphyses of long bones and the bones of the skull.

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