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Old 01-22-2013
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Zygote what is the embryological origin of esophagus and nasal cavity?

hello,

what is the embryological origin of esophagus and nasal cavity?

and what is the embryo origin of epithelium of esophagus and nasal cavity?

is it ectoderm, mesoderm or endoderm?

in FA it is written that epithelium of oral cavity is from ectoderm does that also apply on esophagus?
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Old 01-22-2013
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The esophagus is derived from the endoderm.. along with the rest of GIT upto the anus. The oral/nasal cavity/rakthe's pouch, along with the salivary glands are ectoderm. The last 1/3 of the anal canal is also ectoderm. Basically the 'start' and the 'end' of the GIT is ectoderm, and the long canal inbetween is endoderm.

Also remember the trachea, bronchi, alveoli as well as the liver/gallbladder/pancreas are also derived from the endoderm.
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