Which of the following terms is synonymous with trabecular bone tissue, i.e., bone with relatively high porosity?

Trabecular bone tissue, also known as cancellous bone, is characterized by its high porosity and spongy structure. It is primarily found at the ends of long bones and within the interior of others, providing significant strength while minimizing weight. This type of bone plays a critical role in the structural integrity and function of bones, allowing for the distribution of stress and the storage of marrow.

Cortical bone, in contrast, is dense and forms the outer layer of bones, providing strength and support. Periostic refers to the periosteum, which is a dense layer of vascular connective tissue enveloping the bones, not a type of bone tissue itself. Apaptic is not a widely recognized term in bone biology and does not relate to the structures or classifications of bone tissue.

Recognizing these distinctions highlights why cancellous is the correct answer when discussing high porosity bone tissue.