First slide

Skeletal System

Question

Cranial bones are ‘X’ in number and facial bones are ‘Y’ in number. Select the option that correctly represents values of ‘X’ and ‘Y’ and explains why human skull is called dicondylic skull.

Moderate

A

X=8; Y=14 - It includes two sets of bones (cranial and facial)
B

X=14; Y=8 - It has two occipital condyles
C

X=8; Y=14 - It has two occipital condyles
D

X=14; Y=8 - It includes two sets of bones (cranial and facial)

Solution

The cranial bones in human skull are 8: Frontal bone, parietal bones, temporal bones, occipital bone, sphenoid bone and ethmoid bone.
The facial bones in human skull are 14: Maxillary bones, palatine bones, zygomatic bones, nasal bones, lacrimal bones, inferior nasal conchae, vomer bone and a mandible.
Human skull is called dicondylic since it has 2 occipital condyles.

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