Q:

What is a cavity within a bone?

A:

Quick Answer

According to Reference.com, the cavity within a bone is called the medullary cavity. This is the place where bone marrow is found and red blood cells and white blood cells are formed.

Continue Reading

Full Answer

The medullary cavity is surrounded by spongy bone and a thin membrane. Inside this cavity is soft, fatty bone tissue called bone marrow, as HowStuffWorks explains. There are two types of bone marrow: red and yellow. Red bone marrow is made up of hematopoietic stem cells and stromal stem cells. The job of stem cells is to replace and grow into specialized cells. Hematopoietic cells are largely responsible for becoming new blood cells. They replenish both the red and white blood cell counts as well as the platelets. Sometimes these stem cells even create more stem cells, depending on the need. Stromal stem cells, on the other hand, create connective tissue cells, fat cells and bone cells. Yellow marrow is made up mostly of fat, although it can transform into red marrow and produce blood cells if needed.

HowStuffWorks points out that sometimes blood marrow can become diseased, causing disorders such as aplastic anemia and myelodysplastic syndromes, which keep the body from being able to create sufficient blood cells.

Learn more about Bones

Related Questions

  • Q:

    What is bone made of?

    A:

    Bone is made mostly of collagen and calcium. This combination works to make the bones strong and flexible at the same time, enabling them to be protective and rebound from stress fractures.

    Full Answer >
    Filed Under:
  • Q:

    What is fused to form the coxal bone?

    A:

    The coxal, or hip bone consists of the pubis, the ilium, and the ischium, as reported by Teach Me Anatomy. Those three bones are distinct and separate at birth but fuse together as people enter young adulthood.

    Full Answer >
    Filed Under:
  • Q:

    What is a corticated bone?

    A:

    Cortical bone is a dense and rigid layer of calcium-rich osseous tissue that makes up the outer layer of a bone, explains InnerBody. This compact bone layer is cylindrical in shape with a honeycombed structure, providing thousands of tiny canal-like passageways for nerves and blood vessels.

    Full Answer >
    Filed Under:
  • Q:

    How do you distinguish between the true pelvis and the false pelvis?

    A:

    The true pelvis, or pelvis minor, contains a basin-like cavity inferior to the superior aperture, while the false pelvis, or pelvis major, is a wider, heart-shaped cavity found superior to the plane that goes through the linea terminalis, according to The Free Dictionary by Farlex. Both are encased within the pelvic girdle.

    Full Answer >
    Filed Under:

Explore