USMLE Step 1 Review 01 12 Anatomy Pharyngeal Pouch Derivations

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Let’s continue our USMLE Review with Anatomy from the Gold Standard USMLE Step 1 Audio Review program.

Play USMLE Audio MP3 01 12 Anatomy Pharyngeal Pouch Derivations Below

Begin 01 12 Anatomy Pharyngeal Pouch Derivations Transcription

Okay, we’ll quickly touch on pharyngeal pouch derivations.

The branchial pouch derivations are of what embryological origin?

• Endodermic.

How many pharyngeal pouches are there?

• Five.

What is the main structure for pharyngeal pouch 1?

• The middle ear.

How about for pharyngeal pouch 2?

• Tonsils.

What’s the main structure for pharyngeal pouch 3?

• Thymus and inferior parathyroids.

What’s the main structure for pharyngeal pouch 4?

• Superior parathyroids or dorsal wings.

And what’s the main structure for pharyngeal pouch 5?

• Parafollicular C cells of the thyroid gland.

This time, I’ll give the structure and you respond with the pharyngeal pouch number.

Tonsils?

• Pouch 2.

Thymus and inferior parathyroids?

• Pouch 3.

Parafollicular C cells of the thyroid gland?

• Pouch 5.

Middle ear?

• Pouch 1.

Superior parathyroids?

• Pouch 4.

****END OF TRANSCRIPTION****

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