The Long Bones of Our Arms and Legs Are Strong

The long bones of our arms and legs are strong and can resist both compressional and bending forces because

A) they are solid rods of compact bone.
B) their extracellular matrix contains crystals of calcium carbonate.
C) their extracellular matrix consists mostly of collagen and polysaccharides.
D) they have a high density of osteoclasts.
E) they consist of lightweight cancellous bone with an internal meshwork of supporting elements.