Larynx Part 1 - Slide 33
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Thyroid cartilage in perspective from behind. Note foramen thyroideum.
This raises the question Is the thyroid cartilage exclusively
an embryonic derivative of the 4th branchial arch, or is it a
derivative of the 4th and 5th arches? Is forman evidence of incomplete
union of the two arches, or can the foramen be explained by the
presence of the blood vessels?
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