What is the microscopic structure of spongy bone?

What is the microscopic structure of spongy bone?

Spongy (Cancellous) Bone Spongy bone consists of plates (trabeculae) and bars of bone adjacent to small, irregular cavities that contain red bone marrow. The canaliculi connect to the adjacent cavities, instead of a central haversian canal, to receive their blood supply.

What is a spongy bone for kids?

Spongy bone lies beneath most compact bone. It looks like a honeycomb or a sponge, but it is not soft. The many spaces within spongy bone let it absorb shock, or sudden pressure on the bone. Bone marrow fills the hollow spaces in spongy bone. It also fills the hollow tubes of long bones.

Which bones are spongy?

Cancellous bone, also known as spongy or trabecular bone, is one of the two types of bone tissue found in the human body. Cancellous bone is found at the ends of long bones, as well as in the pelvic bones, ribs, skull, and the vertebrae in the spinal column.

What is the structure and function of spongy bone?

Spongy bone provides balance to the dense and heavy compact bone by making bones lighter so that muscles can move them more easily. In addition, the spaces in some spongy bones contain red bone marrow, protected by the trabeculae, where hematopoiesis occurs.

What are bones made of ks1?

What are bones made of? Around 70 percent of your bones are not living tissue, but hard minerals like calcium. The outside of the bone is called the cortical bone. It’s hard, smooth, and solid.

Why are bones spongy?

Spongy bone reduces the density of bone and allows the ends of long bones to compress as the result of stresses applied to the bone. Spongy bone is prominent in areas of bones that are not heavily stressed or where stresses arrive from many directions.

How is spongy bone formed?

The non-mineralized portion of the bone or osteoid continues to form around blood vessels, forming spongy bone. Connective tissue in the matrix differentiates into red bone marrow in the fetus. The spongy bone is remodeled into a thin layer of compact bone on the surface of the spongy bone.

Why is spongy bone so spongy?

Spongy bone is softer and weaker than compact bone, but is also more flexible. It is characterized by a lattice-like matrix network called trabeculae (Latin for little beam) that gives it its spongy appearance.

What does spongy bone look like under a microscope?

Microscope at 40X. Spongy bone is a network of irregularly-shaped sheets and spikes of bone (trabeculae). The trabeculae are only a few cell layers thick. The spaces between the trabeculae contain red or yellow marrow, depending on a person’s age and on which bone it is. The marrow in these images is red marrow.

What is spongy bone made of?

Spongy bone is a network of irregularly-shaped sheets and spikes of bone (trabeculae). The trabeculae are only a few cell layers thick. The spaces between the trabeculae contain red or yellow marrow, depending on a person’s age and on which bone it is. The marrow in these images is red marrow.

Where does red bone marrow fill the space between spongy bones?

Red bone marrow fills the spaces between the spongy bone in some long bones. Each epiphysis meets the diaphysis at the metaphysis. During growth, the metaphysis contains the epiphyseal plate, the site of long bone elongation described later in the chapter.

Are there blood vessels in spongy bone?

There are no blood vessels within the matrix of spongy bone, but blood vessels are nearby in the marrow spaces. Exchange of nutrients, gases, etc. occurs between capillaries in the marrow and the interstitial fluid of the marrow.