Q. 7 - Biology

Question

Which of these is a facial bone? 

1. frontal 
2. occipital 
3. lacrimal  
4. temporal 

Step-by-Step Solution

Answer

The correct answer is option (c).

Lacrimal bone is one of the facial bone. 

Features of the facial bone

• Mandible, maxilla, frontal bone, nasal bones, and zygoma are the main bones of the face. 
• There are 6 paired and 2 unpaired facial bones among the 14 facial bones that make up the face skeleton, which have distinct anatomical structures and go through a development of the embryo. 
• The soft tissues of the face are protected by the facial bones, which also help with structure, breathing, eating, and facial reactions.

Step: 1 Explanation for Correct answer

• The lacrimal bone is a face bone.
• A pair of facial bones called the lacrimal bones are situated in the orbit's medial wall.
• Above the lateral edge of the eye, the lacrimal gland is found in the orbit. 
• The tear-producing mechanism of the eye is supported by lacrimal bones. Thus, the option c is correct.

Step: 2 Explanation for incorrect answer

• An adult's unpaired frontal bone is a component of the bony framework that makes up the superior and anterior sections of the skull. So, option a is wrong.
• The most posterior cranial bone and primary bone of the occiput is the occipital bone. It is viewed as a flat bone. So, option b is wrong as well.
• The unusual shape of the temporal bone typically qualifies it as an irregular bone. Hence, option d is wrong too.