What do the pharyngeal pouches develop into?
The first pharyngeal pouch develops into the middle ear cavity and the eustachian tube, which joins the tympanic cavity to the nasopharynx. The inner surface of the eustachian tube is covered by a mucosal layer of ciliated cells, supporting cells, secretory cells, and connective tissue. What is a pharyngeal pouch in embryology? Pharyngeal pouches are…