Additional Images
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Human embryo from thirty-one to thirty-four days.
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Head end of human embryo, about the end of the fourth week.
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Floor of pharynx of embryo between 18 and 21 days.
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Head end of human embryo of about thirty to thirty-one days.
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The head and neck of a human embryo thirty-two days old, seen from the ventral surface.
Read more about this topic: First Pharyngeal Arch
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