Anatomy Lab 1

Question 1

Superior Meatus

Answer 1

Posterior ethmoidal cells

Question 2

Middle Meatus

Answer 2

Ethmoid Bulla 
-Middle Ethmoidal Cells
Semilunar Hiatus
-Frontal Sinus
-Anterior Ethmoidal 
-Maxillary

Question 3

Inferior Meatus

Answer 3

Nasolacrimal Duct

Question 4

How would you regionally characterize the pharynx. (I.e.: What are it’s superior, inferior and posterior borders)

Answer 4

Superior border: Base of the skull

Inferior border: C6/lower border of the cricoid

Posterior border: Prevertebral fascia, separating it from cervical spine

Question 5

Where are noesbleeds most likely occur

Answer 5

Keiselbach’s area, which receives blood supply from the ethmoid branches of the ophthalmic artery, sphenopalatine and greater palatine arteries of the maxillary artery, and the superior labial branches of the facial artery. All except the ethmoid artery come from the external carotid. It comes from the internal carotid

Question 6

What important structure is located in the nasopharynx and equilibrates pressure with the middle ear?

Answer 6

Eustachian tube

Question 7

What is the function of the salpingopharyneus muscle? What is it innervated by?

Answer 7

This muscle raises the larynx and pharynx during swallowing. It also raises the walls of the pharynx laterally.

It’s innervation comes from the pharyngeal plexus

Question 8

What are the two muscles of the pharynx whose motor function is not innervated by the pharyngeal plexus?

Answer 8

Stylopharyngeal muscle: CN IX

Tensor veli palatini: CN V3

Question 9

What is the innervation of the genioglossus muscle?

Answer 9

Hypoglossus

Question 10

What is the significance of Waldeyer’s ring?

Answer 10

It contains tubal, lingual, palatine and pharyngeal (adenoid) tonsils

Question 11

Is the cricoid cartilage above or below the voice box?

Answer 11

Below

Question 12

What is the only muscle of the tongue NOT innervated by the hypoglossus?

Answer 12

Palatoglossus (Innervated by the vagus nerve via the pharyngeal plexus)

Question 13

What drains the sphenoid sinus?

Answer 13

The sphenoethmoidal recess

Question 14

What is Killian’s dehiscence, and why is it clinically relevant?

Answer 14

Potential triangulation gap between fibers of the inferior constrictor.

The pharyngeal mucosa can herniate through here in the case of pharyngeal pouch.

It is also a common site of perforation during an endoscopy.

Question 15

Where is a tracheostomy performed?

Answer 15

Midway between the laryngeal prominence (Adam’s apple) and jugular notch, at about the level of the second or third tracheal ring.