AP BIOLOGY

Detailed explanation-1: -Compact bone is smooth, homogenous, and dense. Spongy bone has lots of needle like pieces called trabeculae and lots of spaces. We classify bones by their shape. Long-longer than wide, compact bone outside, some have spongy bone on the interior.

Detailed explanation-2: -Compact bone: also known as cortical bone, this hard-outer layer is strong and dense. Cancellous bone: also known as trabecular bone, this spongy inner layer network of trabeculae is lighter and less dense than cortical bone.

Detailed explanation-3: -compact bone, also called cortical bone, dense bone in which the bony matrix is solidly filled with organic ground substance and inorganic salts, leaving only tiny spaces (lacunae) that contain the osteocytes, or bone cells.

Detailed explanation-4: -What does it mean that compact bone is homogeneous and spongy bone is heterogeneous? Compact bone is homogeneous because it protects and supports. Spongy bone is heterogeneous because it had many open spaces and is a meshwork of supporting fibers called trabeculae.

Detailed explanation-5: -Compact bone, also known as cortical bone, is a denser material used to create much of the hard structure of the skeleton. As seen in the image below, compact bone forms the cortex, or hard outer shell of most bones in the body. The remainder of the bone is formed by cancellous or spongy bone.