Question

Haversian canals occur in
a. All bones
b. Long bones
c. Alimentary canal
d. None of the above

Answer 1

Hint: The structural formation of a compact bone is called the osteon or Haversian canals system. Each Haversian canals system is an elongated cylinder oriented parallel to the long axis of the bone in the body. The system consists of a central Haversian canal with concentric rings that is lamellae of bone matrix running lengthwise. The Haversian canal system is present in long bones.

Complete answer:
> Option A- All Bones
A bone is a rigid organ that constitutes part of the vertebrate skeleton in animals as well as humans. Bones protect the various organs of our body, they also produce red as well as white blood cells, store minerals, provide structure and support for the body, along with enabling mobility.

> Option B- Long Bones
Long bones are hard, dense bones that give strength, structure, as well as mobility. The thigh bone known as femur is a long bone. A long bone has a shaft and two ends. Some bones in the fingers are classified as long bones, even though they are not long in length. This is due to the shape of the bones, not their size.

> Option C- Alimentary canal
The mucous membrane-lined tube of the our digestive system that extends from the mouth to the anus as well as food passes through and the process of digestion takes place, along with wastes is eliminated. It consists of the pharynx, esophagus, stomach, as well as intestines. Alimentary canal tract digestive tract.

Hence, the correct answer is option (B).

Note: The long bones of the human leg consists of nearly half of adult height. The other primary skeletal component of height is the vertebrae along with the skull in our body. Long bones contain yellow bone marrow along with red bone marrow, which produce blood cells.