When discussing the interior quality of bones, the science instructor mentions that spongy bone has which of the following unique qualities? Select all that apply
A) Rigidity
B) Thickness
C) A growth plate
D) Tensile strength
E) Weight-bearing properties
Ans: D, E
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Cancellous (spongy) bone is relatively light and composed of trabeculae of bone that form a lattice-like pattern. Its structure is such that it has considerable tensile strength and weight-bearing properties. Compact (cortical) bone forms the outer shell of a bone and has a densely packed calcified matrix that makes it more rigid than cancellous bone, without excessive thickness. Although the cancellous bone contains osteocytes to maintain the bony matrix, active bone growth occurs at the epiphyseal growth plate.
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