Question

Haversian canals occur in

• A. humerus
• B. pubis
• C. scapula
• D. clavicle.

Answer 1

The Correct Option is A

To determine where Haversian canals occur, we need to understand what they are and their significance in human anatomy.

Haversian canals, also known as osteonic canals, are a series of microscopic tubes found in the compact bone. These canals allow blood vessels and nerves to travel through them, providing nutrients and removing waste products from osteocytes (bone cells).

The question provides four options:

• humerus
• pubis
• scapula
• clavicle

Let's evaluate each option:

1. Humerus: The humerus is a long bone in the arm, extending from the shoulder to the elbow. It primarily consists of dense compact bone, where Haversian canals are prominently found. The presence of these canals is crucial for the strength and health of long bones like the humerus.
2. Pubis: The pubis is part of the pelvic bone and primarily made of spongy bone, where Haversian systems are not typically prevalent. It does not have the long tubular structure necessary for the extensive Haversian canal system.
3. Scapula: The scapula, or shoulder blade, is also made largely of spongy bone rather than compact bone, making it less likely to contain prominent Haversian canals.
4. Clavicle: The clavicle, or collarbone, does contain some compact bone, but it lacks the extensive presence of Haversian canals compared to long bones such as the humerus.

Hence, the correct answer is humerus