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yes, all vertebrates have gill slits in the womb but as they develop most species lose the gills. this is an example of comparative embriology which helps scientist discover a common ancestor
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What is a pharyngeal gill?
Pharyngeal slits are not gill slits. They are filter-feeding organs in non-vertebrates, and are used to strain matter and food from water.
What animals have a tubular nerve cord and gill slits at some point in their lives?
No, not all vertebrates have tubular nerve cord.
How do agnatha breath?
by the gill slits
Do gill slits disappear before birth in all chordates?
no.
Do crocodile have any rudimentary gills because they were evolved by a fish named tiktaalik?
Regardless of the presumed relationship to tiktaalik, you will find gill slits to be present in all vertebrates. In reptiles, the slits would not persist past the embryonic stage but, the crocodiles' jaws were derived from the gill arches. Look up "Ontogeny recapitulates phylogeny."
How many gill slits does a leopard shark have?
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.
What two things are present in all vertebrates but not some chordates?
A distinct brain and gill slits used for respiration as opposed to filterfeeding. Granted, those last ones aren´t found outside the fish class, but other vertebrates still develop them in their embryology.
What is the function of the gill slits?
Gill slits in sharks and rays help to funnel water into the gills, which empty into the pharynx and eventually the lungs.
What do all choradates have?
all chordates have notochord, gill slits, postanal tail, and nerve chord.
What are the openings in the throat region of a fish that lead to the gill chamber?
gill slits
Are people born with gill slits?
yes.
All vertebrate embryos develop gills during one of the many growth phases in their development?
It would be more appropriate to say that all vertebrate embryos develop pharyngeal gill slits during one of the many phases in their embryonic development. This is because while gills are specifically present in fishes, pharyngeal gill slits are a general chordate feature.
