Otic vesicle chick, invagination of the otic placode occurs passively due to the movements of the surrounding placode. The otic placode in zebrafish, on the other hand, occurs by cavitation; the ectodermal placode condenses and forms an ovoid ball directly below the embryo surface. Otic vesicle formation occurs later, during the 25-30 somite stage in mice. Otic vesicle Otic vesicle, or auditory vesicle, consists of either of the two sac-like invaginations formed and subsequently closed off during embryonic development. It is part of the neural ectoderm, which will develop into the membranous labyrinth of the inner ear. This labyrinth is a continuous
History of anatomy human physiology and anatomy, as anyone was welcome to witness the spectacle. Participants "were fascinated by corporeal display, by the body undergoing dissection". Most professors did not do the dissections themselves. Instead they sat in seats above the bodies while hired hands did the cutting. Students and observers would be placed around the table in a circular, stadium-like arena and listen as professors explained the various anatomical parts. As anatomy theaters gained popularity throughout the 16th century, protocols were adjusted to account for the disruptions of students. Students moved beyond simply being eager to participate, and began stealing and vandalizing