Question

Select the correct pair which shows the same relation as in the given pair:
" Skull-Eyes"

a) Cranium- Brain

b) Ribcage- stomach

c) Vertebral column- kidneys

d) Pectoral girdle- Heart

Answer 1

Explanation:

What are cranial bones?

Your skull provides structure to your head and face while also protecting your brain. The bones in your skull can be divided into the cranial bones, which form your cranium, and facial bones, which make up your face.

There are several types of bones within your body, including:

long bones

short bones

flat bones

irregular bones

sesamoid bones

There are two types in your cranium:

Flat bones. As their name suggests, these bones are thin and flat, though some of them have a slight curve.

Irregular bones. These are bones with complex

shapes that don’t fit into any of the other categories.

Anatomy and function

There are eight cranial bones, each with a unique shape:

Frontal bone. This is the flat bone that makes up your forehead. It also forms the upper portion of your eye sockets.

Parietal bones. This a pair of flat bones located on either side of your head, behind the frontal bone.

Temporal bones. This is a pair of irregular bones located under each of the parietal bones.

Occipital bone. This is a flat bone located in the very back of your skull. It has an opening that allows your spinal cord to connect to your brain.

Sphenoid bone. This is an irregular bone that sits below the frontal bone. It spans the width of your skull and forms a large part of the base of your skull.

Ethmoid bone. This is an irregular bone located in front of the sphenoid bone. It makes up part of your nasal cavity.

Your cranial bones are held together by unique joints called sutures, which are made of thick connective tissue. They’re irregularly shaped, allowing them to tightly join all the uniquely shaped cranial bones. The sutures don’t fuse until adulthood, which allows your brain to continue growing during childhood and adolescence.

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