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What does spongy bone contain?
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.
Do bones have fat?
And marrow is also full of fat. The amounts of these cells and fats can decrease or increase over time. And the production of these marrow cells and fat depend on a specific type of progenitor cell called a mesenchymal stem cell. In your bones, there is fat.
Which part of a long bone would contain stored fat?
| External Bone Feature | Description |
|---|---|
| Diaphysis | The main part, or shaft, of a long bone. It usually contains the one marrow and adipose tissue (fat.) |
| Cartilage | Firm, yet soft and flexible connective tissue found between bones or between bones and joints. |
| Periosteum | Dense, fibrous, membrane covering the surface of a bone. |
What is the function of the spongy bone?
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 does spongy bone get nutrients?
The spongy bone and medullary cavity receive nourishment from arteries that pass through the compact bone. The arteries enter through the nutrient foramen (plural = foramina), small openings in the diaphysis (Figure 6.3.
Why do bones store fat?
The fats in yellow bone marrow are stored in cells called adipocytes. This fat can be used as an energy source as needed. Yellow bone marrow also contains mesenchymal stem cells. So, most bones in an adult body contain yellow bone marrow.
Where are the spongy bones located in the body?
Spongy bone is usually located at the ends of the long bones (the epiphyses), with the harder compact bone surrounding it. It is also found inside the vertebrae, in the ribs, in the skull and in the bones of the joints.
What’s the difference between compact and spongy bone?
While compact bone is denser and has fewer open spaces, spongy bone is ideal for making and storing bone marrow within the lattice-like trabeculae network. Compact bone stores yellow bone marrow, which is composed primarily of fat, in its medullary cavity.
What is the function of spongy bone in bone marrow?
Functions of Spongy Bone Storage of Bone Marrow Bone marrow, also called myeloid tissue, is formed when the trabecular matrix crowds blood vessels together and they condense. While compact bone is denser and has fewer open spaces, spongy bone is ideal for making and storing bone marrow within the lattice-like trabeculae network.
Where does compact bone store yellow bone marrow?
Compact bone stores yellow bone marrow, which is composed primarily of fat, in its medullary cavity. Spongy bone contains red bone marrow that is used in erythropoiesis.