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Chapter 38: Problem 7

Which of these is a facial bone? a. frontal b. occipital c. lacrimal d. temporal

Short Answer

Expert verified
c. lacrimal

Step by step solution

01

Understand the Question

Identify which of the given options is a facial bone among frontal, occipital, lacrimal, and temporal.
02

Identify Facial Bones

Facial bones include bones such as nasal, vomer, maxilla, palatine, zygomatic, inferior nasal concha, and lacrimal.
03

Review Each Option

a. Frontal - This bone forms the forehead and is part of the cranial bones.b. Occipital - This bone is located at the back of the skull and is also a cranial bone.c. Lacrimal - This is a small bone located in the medial wall of each orbit (eye socket) and is a facial bone.d. Temporal - This bone is located on the sides and base of the skull and is a cranial bone.
04

Conclusion

Among the options given, the lacrimal bone is the only one that is a facial bone.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

cranial bones
Cranial bones are the bones that form the skull. They protect the brain and provide structure to the head. There are eight main cranial bones:
  • Frontal: forms the forehead
  • Parietal (2): located on the sides and top of the skull
  • Temporal (2): situated at the sides and base of the skull
  • Occipital: found at the back and base of the skull
  • Sphenoid: sits at the base of the skull and in front of the temporal bones
  • Ethmoid: located at the roof of the nose
These bones are crucial for protecting the brain and supporting the structures of the face.
lacrimal bone
The lacrimal bone is one of the smallest and most delicate bones in the human body. It is located in the medial wall of each orbit (the eye socket).
Lacrimal bones have several important functions:
  • Support the eye's structure: They provide support to the eye socket by forming part of its wall.
  • House the lacrimal sac: This sac collects tears from the eye and drains them into the nasal cavity, helping with tear drainage and nasal function.
Despite their small size, lacrimal bones play a significant role in both the visual and respiratory systems.
human skull anatomy
The human skull is a complex structure composed of 22 bones. It can be divided into two main parts: the cranial bones and the facial bones.
  • Cranial Bones: These are the bones that surround and protect the brain. There are 8 cranial bones.
  • Facial Bones: These include 14 bones that give shape to our face and provide protection for sensory organs like the eyes, nose, and mouth.
The facial bones include the nasal bones (bridge of the nose), the maxilla (upper jaw), the mandible (lower jaw), the palatine (roof of the mouth), the zygomatic bones (cheekbones), and the lacrimal bones (near the eye sockets).
Understanding the anatomy of the human skull can help in identifying specific bones and their roles in both protection and function of the brain and sensory organs.

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