Embryologists and more especially those zoologists who are engaged in teaching must long have felt that there is some confusion, or at least want of precision, in the use of the word mouth. Sometimes it is used to mean simply the anterior opening of the alimentary canal; at other times a more special morphological significance is attached to it, and the term is used to denote the anterior opening leading from the ectodermal stomodaeum into the endodermal cavity or enteron.

Copyright © 1935 by the Company of Biologists Ltd.
1935
You do not currently have access to this content.