Question

What is cavity in bones ?

Answer 1

Hint: Skeleton system consists of a framework of bones and a few cartilages. This system has a significant role in moments shown by the body. Bone has a very hard Matrix due to calcium salts in it. Where cartilage has a slightly pliable matrix due to chondroitin salts.

Complete Answer:
- The cavity of the bone is the medullary cavity which is the central cavity of bone shafts where red bone marrow or yellow bone marrow containing adipose tissue is stored hence the medullary cavity is also known as marrow cavity.
- It is located in the main shaft of long bone consisting mostly of compact bone, the medullary cavity has walls composed of spongy bone
- However the medullary cavity is the area inside any bone that holds the bone marrow.
- This area is involved in the formation of red blood cells and white blood cells, and the calcium supply for bird egg shells.
- This area has been detected in Fossil bones despite the fossilization process.

Some additional information:
- In humans there are 206 bones. That means your skeletal system is made up of 206 bones and few cartilage.
- It is grouped into two principal divisions, the axial and appendicular skeleton.
- Axial skeleton comprises 80 bones distributed along the main axis of the body.
- The bones of the limbs along with their girdles constitute the perpendicular skeleton system. Appendicular skeleton system consists of about 126 bones.

Note: When people reach their old age then age related disorder characterized by decreased bone mass and increased chances of fractures. Decreased levels of estrogen is the common cause.