-L-03-ethmoid bone

Question 1

Ethmoid Bone
Q: What is the function of the ethmoid bone?
Q: Where is the ethmoid bone located?
Q: What are the four parts of the ethmoid bone?
Q: What does the cribriform plate do?
Q: What is the function of the perpendicular plate?
Q: What does the labyrinth of the ethmoid bone contain?
Q: Which nasal conchae are part of the ethmoid bone?
Q: What is the ethmoid bulla?

Answer 1

A: It separates the nasal cavity from the brain and forms part of the anterior cranial fossa.
A: At the roof of the nose, between the two orbits.
A:

Cribriform plate
Perpendicular plate
Two lateral masses (labyrinths)

A: It allows fibers of the olfactory nerve to pass from the nasal mucosa to the olfactory bulb.
A: It helps form the nasal septum.

A: Ethmoidal air cells arranged in three groups (anterior, middle, and posterior).

A: The superior and middle nasal conchae.

A: A bulge formed by ethmoidal air cells.

Question 2

Mandible
Q: What is the function of the mandible?
Q: How does the mandible develop?
Q: What is the mandible an attachment site for?

Answer 2

A: It forms the lower jaw and articulates with the cranium at the temporomandibular joint (TMJ).
A: The two halves of the mandible unite in the midline at birth.
A: The muscles of mastication.

Question 3

Hyoid Bone
Q: What is unique about the hyoid bone?
Q: Where is the hyoid bone located?
Q: What suspends the hyoid bone?
Q: What is the main function of the hyoid bone?

Answer 3

A: It does not articulate with any other bone.

A: In the mid-sagittal plane at the level of the 3rd cervical vertebra.

A: The stylohyoid ligaments, which connect it to the styloid process.

A: It serves as an attachment site for muscles, particularly those of the tongue.