by the gill slits
A leopard shark has five gill slits on either side of its body. The gill slits are on the sides of the shark's head.
Pharyngeal slits are not gill slits. They are filter-feeding organs in non-vertebrates, and are used to strain matter and food from water.
gill slits
yes.
I am not sure if this is a correct answer to your question, because i am no expert on fowl, but I am not aware of birds ever having gill slits in there formation. Humans have slits that have been misconstrued to be gill slits but those are there to help with the formation of your neck and ears. I imagine that the two cases are related, but, like I said, I am no expert on birds.
gill slits
7
A. Humans.
Gill slits on land animals have almost completely disappeared. These animals that now live on land no longer need gills.
The vast majority of the 500+ known species of shark have 5 gill slits, there are 4 species that have 6 gill slits and 2 species that have 7
it has 4 gill slits for extra air to breathe while it has another nose on its nostrils to smell prey from a far away distance