Final answer:
Cortical bone tissue forms the smooth, dense outer layer of bones and provides strength and rigidity, while spongy bone tissue is porous and lighter, found inside bones where it aids in blood cell production within its trabecular network.
Step-by-step explanation:
The student's statement about cortical bone being 'spony and soft' is a misunderstanding. In fact, cortical bone tissue is a type of bone tissue that is smooth and dense, making up the outer layer of bones. This layer is what gives bones their smooth, white appearance and considerable strength and rigidity. Distinguishing between the two bone tissues is important because each has distinct characteristics and functions within the skeletal system.
In contradiction to cortical bone, spongy bone, also known as cancellous bone, is indeed more like a sponge in terms of its structure. It's characterized by a porous, light network that allows the bone to maintain strength while significantly reducing weight. This type of bone is commonly found in the interior of bones, notably in areas such as the ends of long bones, and inside short bones like those of the wrist and ankle. It also plays a crucial role in the production of blood cells as it contains red bone marrow within its trabeculae - a lattice-like network of matrix spikes.