Spongiosa, also known as cancellous or trabecular bone, is a porous, less dense form of bone tissue found at the ends of long bones, within the spinal vertebrae, and inside the pelvis. It is characterized by a network of trabeculae (small, beam-like structures) that provide structural support and flexibility. Unlike compact bone, spongiosa has a higher surface area due to its porous nature, which plays a crucial role in metabolic activities, such as the exchange of calcium ions.
