Question

Number of bones in human axial skeleton is
a. 80
b. 100
c. 106
d. 126

Answer 1

Hint: Ossicles of the middle ear, hyoid bone, rib cage and vertebral column constitution of the axial skeleton have 80 bones. The bone of the head and trunk of the vertebrate is part of the axial skeleton. Axial skeleton composed 29 bones in the head, 25 in the thorax, and 26 in the vertebral column.

Complete answer:
With the help of the bones the body maintains the shape, support of the body and is strong enough to support the entire weight of the body. It helps to protect the body organs such as the brain and other parts of the body. Axial skeleton is the combination of thoracic and vertebral column which helps to protect the vulnerable organs of the human body that consist not of bony thorax, skull and vertebral column. Ligaments and muscles attach through the projection band that’s helped from the joints. And also help to the opening of nerves, blood vessels and depressions. Intramembranous ossification formed from the skull and bones of the face throughout the like of axial skeleton. There are three types of major bone present in the human axial system.

> Structural Bones:-
- In sutures small bones are present.
- Structural bones are irregular in size, shape and location.
- Structural bones are not present in all the human bodies.

> Ethmoid Bones:-
- Ethmoid Bones present between the sphenoid and nasal bone.
- In the orbits and nasal cavity most of the bony regions are present.

> Maxillary Bones:-
- In the maxillofacial bones present with the articulate except the mandible.
- Largest paranasal contains maxillary sinuses present in the maxillary bones.

Hence, the correct answer is option (A).

Note: Bones Nasal cavity, hyoid bone, orbits and paranasal sinuses are the special parts of the skull. Paranasal lined with the mucous membrane, served lightning to the skull and ethmoid bone, sphenoid bone, maxillary bone and frontal bone air filled part of it. The hyoid bone has no direct articulation with other bones and is present in the mandible inferior and helps to move in the tongue base.