Pharynx

Question 1

Pharynx

Answer 1

continuation of the digestive tube below the oral and nasal cavities. 3 parts: nasopharynx, oropharynx, and laryngopharynx.

Question 2

Nasopharynx

Answer 2

Most superior portion of the pharynx; posterior to the nose

Question 3

Oropharynx

Answer 3

Middle portion of the pharynx; posterior to the mouth

Question 4

Laryngopharynx

Answer 4

Inferior portion of the pharynx; posterior to the larynx

Question 5

Superior opening of the Pharynx

Answer 5

Nasopharynx, at the base of the skull.

Question 6

Inferior opening of the pharynx

Answer 6

At level of cricoid cartilage of larynx and the 6th cervical vertebra

Question 7

Pharyngeal wall

Answer 7

5 levels: Mucus membrane, submucosa, pharyngobasilar fascia, skeletal muscle layer, buccopharyngeal layer

Question 8

Mucus membrane

Answer 8

Most anterior layer of the pharyngeal wall

Question 9

Submucosa

Answer 9

Below the muscus membrane of the pharynx (duh).

Question 10

Pharyngobasilar fascia

Answer 10

Situated between muscosa and muscular layers. Diminishes in thickness as it descends

Question 11

Skeletal muscle layer

Answer 11

Level is comprised of the constrictor muscles of the pharynx. Between pharyngobasilar fascia and buccopharyngeal fascia layer.

Question 12

Buccopharyngeal fascia layer

Answer 12

Invests constrictor muscles of the pharynx. Space between the the buccopharyngeal fascia and prevertebral fascia is the Retropharyngeal space. Contains the pharyngeal plexus.

Question 13

Superior Constrictor

Answer 13

Largest of the three constrictor muscles; Originates from the pterygoid hamulus, pterygomandibular raphe and mandible. It has an additional attachment at the pharyngeal tubercle of the occipital bone. Innervated by the pharyngeal plexus

Question 14

Middle Constrictor Muscle

Answer 14

Constrictor muscle of the pharynx. Originates from the hyoid bone. Innervated by the pharyngeal plexus

Question 15

Inferior Constrictor Muscle

Answer 15

Originates from the thyroid cartilage, blends with the esophagus inferiorly. Innervated by the pharyngeal plexus.

Question 16

Stylopharyngeus

Answer 16

Originates from the styloid process. Passes between the superior and middle constrictors to inserts on the thyroid cartilage. Innervated by CN IX.

Question 17

Pharyngeal Tonsils

Answer 17

Found in the nasopharynx

Question 18

Pharyngeal Plexus

Answer 18

The plexus receives nerve fibers from CN IX, X and XI, and sympathetic nerves

Question 19

Sensory innervation to Pharynx

Answer 19

The sensory innervation to the pharynx is provided by CN IX