Question

Skull bones are
A. Replacing bones
B. Investing bones
C. Sesamoid bones
D. Irregular bones

Answer 1

Hint: Vertebrates, they contain a structure called skull, which is a bony structure. The main function of the skull is to support and protect the cavity of the brain. The cranium covers the anterior-maximum part of the skeleton and paperwork the sensory structures, that are a part of the facial skeleton. The cranium forms all the upper portion of the skull, with the bones of the face situated beneath its forward part.

Complete Answer:
1) The accurate solution is (A). The correct reason is that a bone flap a section of the skull is removed to access the brain underneath. The bone flap is typically replaced with tiny plates and screws. Some extra cartilage also is changed for the duration of childhood, and a few cartilage stays within the person's skeleton. Therefore, we can conclude that the skull has replaced bones. Hence, the proper solution is 'Replacing bones'.
2) If we talk about investing bones, it is also known as dermal bone. It is a type of bone that ossifies directly from the membrane without a cartilaginous predecessor; it occurs only in the skull and shoulder region. It is likewise called membrane bone. It doesn’t get replaced and is not present in the skull. Therefore, option (B) is wrong.
3) A sesamoid is a bone embedded in a tendon. Sesamoids can be found in several joints in the body which help in the movement of the body. The sesamoids are pea-shaped bones positioned withinside the ball of the foot, underneath the large toe joint. Hence, option (C) is likewise incorrect.
4) An abnormal bone is one that doesn't have any without difficulty characterised form and consequently does now no longer healthy any classification. Therefore, alternative (D) is likewise incorrect.

Note: Bone is a connective tissue, which is mineralized in nature which means it is formed of minerals. Bones exhibit four types of cells: osteoblasts, bone lining cells, osteocytes, and osteoclasts. Bones play a very important function in locomotion, support and protection of the body.