gill slit

• 鱼或其他水生动物头部或身体侧面让水在流经鳃后排出以完成呼吸的开口。也可指胚胎或早期发育阶段头颈部两侧的鳃裂。

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.

   鳃裂

   • 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.

   鳃裂

   • 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.