| 释义 |
Definition of gill slit in US English: gill slitnounˈɡil ˌslitˈɡil ˌslit 1Any of a series of openings between the gill arches of a fish, through which water passes from the pharynx to the exterior, bathing the gills in the process. Example sentencesExamples - They have long ugly snouts and gill slits which seem almost to encircle the whole head.
- One small gill slit is found in front of each pectoral fin.
- Adults are uniformly brownish gray, shiny on top and pale on the ventral side and around gill slits.
- Water is taken in through the spiracles, passed over the gills, and expelled through the gill slits on the underside of the body.
- Water exits through the gill slits at the back of the head.
2A set of grooves similar to gill slits found in embryos of higher vertebrates. Example sentencesExamples - Thus, the gill slits of the early human embryo supposedly repeat our distant ancestral past as a fish, while the transient embryonic tail, developing just afterward, marks the later reptilian phase of our evolutionary ascent.
- This may be illustrated by the gill slits in the embryos of higher vertebrates like reptiles, birds and mammals.
- For Darwin, such apparently useless phenomena as the human appendix, or the tail and gill slits of the early stages of the human embryo, were signs of our evolutionary history.
- Another myth is the claim human embryos go through a fish-like stage and display gill slits.
- Although they retain the chordate characters as adults gill slits are present only in the embryonic stages of land vertebrates.
Definition of gill slit in US English: gill slitnounˈɡil ˌslit 1Any of a series of openings between the gill arches of a fish, through which water passes from the pharynx to the exterior, bathing the gills in the process. Example sentencesExamples - Water is taken in through the spiracles, passed over the gills, and expelled through the gill slits on the underside of the body.
- They have long ugly snouts and gill slits which seem almost to encircle the whole head.
- Adults are uniformly brownish gray, shiny on top and pale on the ventral side and around gill slits.
- Water exits through the gill slits at the back of the head.
- One small gill slit is found in front of each pectoral fin.
2A set of grooves similar to gill slits found in embryos of higher vertebrates. Example sentencesExamples - Thus, the gill slits of the early human embryo supposedly repeat our distant ancestral past as a fish, while the transient embryonic tail, developing just afterward, marks the later reptilian phase of our evolutionary ascent.
- Another myth is the claim human embryos go through a fish-like stage and display gill slits.
- Although they retain the chordate characters as adults gill slits are present only in the embryonic stages of land vertebrates.
- This may be illustrated by the gill slits in the embryos of higher vertebrates like reptiles, birds and mammals.
- For Darwin, such apparently useless phenomena as the human appendix, or the tail and gill slits of the early stages of the human embryo, were signs of our evolutionary history.
|