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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 08 Anatomy Branchial Derivations Below
Begin 01 08 Anatomy Branchial Derivations Transcription
- Gill structures in marine animals.
In humans, what are the branchial derivations analogous to?
What used to be hearing organs and gill organs in marine animals are now in humans what four general functions associated with the branchial or pharyngeal structures?
- Hearing, facial expression, chewing, speaking.
On this tape, we will use the term branchial in honor of the evolutionary derivation.
What three types of branchial structures will we be looking at?
- Clefts, arches and pouches.
About the only thing branchial clefts turn into is what?
- The external auditory meatus.
Knowing this, what embryonic tissue are branchial clefts derived from?
In the branchial region, bone, connective tissue, muscle and blood vessels are derived from what branchial structure?
- Branchial arches.
And what would the embryonic derivation be?
The cranial nerves innervating the branchial arches are from what kinds of embryonic cells?
- Neural crest cells.
Of what embryonic origin are the neural crest cells?
But we also have branchial glands. What type of branchial structure are the glands derived from?
- Branchial pouches.
****END OF TRANSCRIPTION****
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