gill slit การใช้

• Like the gill slits of higher fish, each pouch contains two gills.
• The gill slits are long and extend onto the top of head.
• Members of this lineage have numerous gill slits, and have separate sexes.
• The male nips at the female's gill slits using its longer-cusped teeth.
• The five pairs of gill slits are very small, and the dental bands.
• The true gill slits in embryonic fish develop into fish gills.
• Four gill slits lined with gill rakers are hidden underneath the external gills.
• The other shark species with seven gill slits is the broadnose sevengill shark.
• The five pairs of gill slits are short and nearly vertical.
• There are five pairs of gill slits, with the fifth pair the longest.
• A smaller opening, the spiracle, lies in the back of the first gill slit.
• The thick skin is covered by well-calcified dermal denticles, except around the gill slits.
• Lampreys and hagfish do not have gill slits as such.
• Gill slits likely originated from pharyngeal slits in tunicates that were used for filter-feeding.
• Its cephalic fins, inside of its mouth and its gill slits are often black.
• In fish, sand will be pumped out of the mouth through the gill slit.
• The pectoral fins originate below the fourth gill slit and have gently curved margins.
• For Gulf killifish, their gill slit extends dorsal to the uppermost pectoral fin ray.
• Their mouths and gill slits are located on their undersides.
• As the name suggests, this shark has six gill slits, unusual among most shark species.