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
Sociopolitical issues of anatomy in America in the 19th century US similarly sought to set the medical profession apart from alternative medicine and other rivals through increased anatomical studies. As a result, the demand for corpses by medical students for dissection studies grew, which in turn propelled widespread medical grave-robbing, social strife and legislative changes to provide anatomists with legal supplies of cadavers. Medical grave robbery prompted anatomy riots in nearly every medical institution and drove changes in legislatures. The increase in importance of anatomy in medical studies also increased society's interest in the human body, which prompted the popularization of anatomy museums. The societal funerary obligation to respect the