詞語:stomodeum
stomodeum的解釋
stomodeum['stəmə'di:əm, ,stɔm-][醫]口凹;口道
stomodeum的意思
stomodeum 口道;口凹;原始口腔;原口,口凹;foregut stomodeum 前腸;secondary stomodeum 釋義:次級口道;
stomodeum的參考例句
1.The primitive mouth, or stomodeum, is a slight depression on the surface of the ectoderm. 原始的口(或口凹)是外胚層表面的一個輕微的凹陷。
2.Early in the fourth week after fertilization, fie facial primordia appear around the stomodeum. 在受精後第四周初,口凹周圍面部形成了5個隆起。
3.In the course of development, the invagination of stomodeum occurs earlier than that of proctodeum at the third and the sixth nauplius stages respectively. 在發育過程中,口凹是在第三期無節幼蟲時內陷形成,而原肛是在第六期無節幼蟲時內陷形成的,所以口凹的發生早於原肛的發生。