W2: S10 - Pharynx Flashcards

1
Q

What are the three parts of the pharynx?

A
  • Nasopharynx
  • Oropharynx
  • Laryngopharynx
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2
Q

What forms the roof oof the nasopharynx?

A

Nasopharyngeal tonsils

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3
Q

In relation to the larynx, where does the laryngopharynx lie?

A

Posteriosuperior

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4
Q

During swallowing, what prevents a bolus from entering the nasopharynx?

A

Soft palate muscles

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5
Q

During swallowing, what prevents the bolus from entering the larynx?

A

Epiglottis

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6
Q

How many layers does the pharynx have?

A

3

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7
Q

What are the 3 layers of the pharynx?

A
  • Outer muscular layer
  • Middle fibrous layer
  • Inner mucous membrane
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8
Q

How can the outer muscular layer of the pharynx be further divided?

A
  • Outer circular layer
  • Inner longitudinal layer
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9
Q

What muscles form the outer circular layer?

A

Pharyngeal constrictor muscles

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10
Q

What muscles form the inner longitudinal layer?

A
  • Stylopharyngeus
  • Salpingopharyngeus
  • Palatopharyngeus
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11
Q

What muscle is shown here?

A

Stylopharyngeus

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12
Q

What muscle is shown here?

A

Salpingopharyngeus

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13
Q

What muscle is shown here?

A

Palatopharyngeus

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14
Q

What’s the role of the fibrous pharyngeal layer?

A

Connects with deep fascia

Fills in gap between muscles

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15
Q

Where does the pharynx recieve innervation from?

A

The pharyngeal plexus

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16
Q

What 2 cranial nerves form the pharyngeal plexus?

A

Vagus

Glossopharyngeal

17
Q

Which of the cranial nerves provides sensory innervation to the pharynx?

A

Glossopharyngeal

18
Q

Which nerve of the pharnygeal plexus provides most of the motor innervation?

A

Vagus

19
Q

What is the role of the pharyngeal constrictors during swallowing?

A

Peristalsis

20
Q

What is the action of the longitudinal muscles during swallowing?

A

Shorten and widen the pharnyx

21
Q

What is Waldeyer’s ring?

A

A collection of lymphoid tissue that protects the entrance to the oropharynx (also known as the pharyngeal lymphoid ring)

22
Q

What is the purpose of Waldeyer’s ring?

A

First line of defence