The tubular ________ indicated by letter H consists of a thick collar of compact bone that surrounds the central medullary cavity.

Tubular

Describes something that is long, hollow, and cylindrical, often used in reference to certain structures or shapes in biology and manufacturing.

Compact Bone

The dense, hard outer layer of bone that gives it strength and houses osteocytes in a rigid framework.

Medullary Cavity

The central cavity within the shaft of long bones where bone marrow is stored.