What type of bone is primarily responsible for providing structural support and houses the bone marrow?

The structural support in bones primarily comes from compact bone, which forms the dense outer layer of the bone and provides strength. While spongy bone, also known as cancellous bone, is less dense and contains the trabecular structure, it is not as responsible for structural support as compact bone. Instead, spongy bone plays an important role in housing the bone marrow, which is essential for blood cell production, and contributes to some structural support due to its internal architecture.

While all types of bone (compact, spongy, and cancellous) have roles in the overall durabilities of bones and house marrow, compact bone is the major component for structural support in the body. Thus, it would be more precise to indicate that compact bone is primarily responsible for providing structural support while spongy bone (or cancellous bone) is crucial for housing the bone marrow. The inclusion of all types in a single answer does not clearly define their specific roles.