Question

What are the differences between cancellous and cortical bone?

1) Cancellous bone is spongy and porous, while cortical bone is dense and compact.
2) Cancellous bone is found in the ends of long bones and in the vertebrae, while cortical bone forms the outer layer of all bones.
3) Cancellous bone has a higher surface area and is involved in bone remodeling and calcium metabolism, while cortical bone provides strength and support.
4) All of the above.

Answer 1

The key differences between cancellous and cortical bone lie in their structure, location, and function. Cancellous bone is spongy and involved in calcium metabolism and bone remodeling, whereas cortical bone is dense and provides strength and structural support for the body.

Step-by-step explanation:

Differences Between Cancellous and Cortical Bone

The differences between cancellous bone and cortical bone are distinct and can be described as follows:

• Cancellous bone, also known as spongy bone, is characterized by its porous, light, and sponge-like structure. It is typically found within the ends of long bones and in the vertebrae. Its high surface area is vital for bone remodeling and calcium metabolism.
• Cortical bone, also referred to as compact bone, is dense and provides the outer layer of all bones, offering structural strength and support. This type of bone is less porous compared to cancellous bone, contains osteons, and makes up about 80% of the adult skeleton's bone mass.

Both types of bone contain essential bone cells like osteoblasts, osteocytes, osteoclasts, and osteogenic cells, which play a role in bone formation, maintenance, and remodeling. While cancellous bone houses elements like red bone marrow and supports hematopoiesis, cortical bone provides the rigidity necessary for our bodies to withstand daily stress and forces.