gill slit

• Ouverture située de chaque côté de la tête ou du corps d'un poisson ou d'un animal aquatique, par laquelle l'eau ressort après être passée sur les branchies pour la respiration.

An opening on the side of the head or body of a fish or aquatic animal that allows water to exit after passing over the gills for respiration.

1. Anatomical structure in fishB2formal

   An external opening on the side of a fish's head that allows water to exit after passing over the gills for respiration.

   fente branchiale

   • Sharks have multiple gill slits on each side of their head.
   • Water flows through the mouth and out the gill slits.
   • The number of gill slits varies among different fish species.

2. Embryonic structure in vertebratesC1formal

   Temporary structures in the embryos of all vertebrates, including humans, that develop into parts of the head and neck.

   fente branchiale embryonnaire

   • In human embryos, gill slits appear briefly during development.
   • These gill slits are also known as pharyngeal arches.
   • The gill slits in a human embryo eventually form parts of the ear and throat.