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Actually, at no point do humans EVER have "gills," or even "gill slits." This common misconception was started in the early years of medicine. There are visible creases on the fetal neck that were originally thought to be remnants of past evolutionary stages. It is now known and commonly accepted that these creases are due to the formation of lymph nodes and lose visibility as the fetus matures.
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∙ 12y ago
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∙ 14y agowell not now if that is what you were saying! If you meant long ago, they still didn't. I mean if humans had gills, they would be able to breath underwater with no problem. I don't think that anyone has ever heard of humans with gills, or they being able to breath underwater without machines or air tanks that scientists have invented. To conclude, I bet there are NOT ANY humans with gills.
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∙ 9y agoYes, humans and all vertebrates have, what are colloquially known as "gill slits" at some point in their life. Indeed "gill slits", or more properly pharyngeal clefts (there are other terms as well) are one of the defining characteristics (along with a hollow dorsal nerve cord, post-anal tail, and notochord) of the phylum of organisms known as chordates to which vertebrates belong.
In humans and other fully land living animals (amniotes) pharyngeal clefts appear during embryonic development and are modified into parts of the jaw, ear and larynx (voice box). In the embryonic development of the various types of fishes, and the larva of some amphibians, the pharyngeal clefts are modified into the jaw and functioning gills.
The best scientific explanation for the appearance of these structures (along with related ones like the aortic arches) is the descent of both fishes (especially the group to which the lung fishes and coelacanths belong) and amniotes from a common ancestor.
For more see: http://pigeonchess.com/2012/05/31/gill-slits-by-any-other-name/
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∙ 14y agoYes, fish have gills.
YES FISH HAVE GILLS the gills are used for the output(takeing the water away) of water after the fish has extracted(picked out) the oxegyn from the water.
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∙ 13y agoYes, all true fish (not to be confused with water dwelling mammals like whales and dolphins) have gills which allow them to breathe in the water.
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∙ 15y agoThey can't grow gills
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∙ 15y agoBecause we breathe air, not water.
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∙ 15y ago*
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∙ 13y agoFish
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Could humans evolve gills?
no, we humans do not have gills because they have lungs unless they use the oxygen thing to go underwater
What are the pros and cons of humans living underwater?
There are few reasons humans cannot live underwater.The main reason, of course, would be that humans lack gills. The gills in fish and other underwater organisms allow the oxygen in the water to be used inside the body. Oxygen is very fundamental to our body; for it keeps us and our cells alive and functioning.Another reason is that in salt water (the ocean), if we did have gills and consumed the water, our cells will lose all of their water because they of the hypertonic environment and they will shrivel up.we can't live under water because our lungs don't take in water they take in air, if we don't have air in our lungs then we could not function right!Were not fish LOL :)
How does a mermaid adapt to its environment?
It adapts because of its tail it has the ability to swim adn its gills for underwater breathing!!
If there is oxygen in water why can't we breathe underwater?
If you recall from basis chemistry, water is made up of 2 hydrogens and 1 oxygen. The reason why we can't breathe underwater is because the oxygen molecule is already bound to the hydrogen molecules. Oxygen in this form is useless to our lungs. Our lungs can't extract oxygen from water
Do underwater plants have roots?
No, but there is kelp and seaweed. The above answer is sort of correct. Mangrove trees will go to seed in rivers and sea coast lines. They live part of their lives completely underwater, but will grow out of the water quickly. I am not sure how long they can live completely underwater.
Could humans evolve gills?
no, we humans do not have gills because they have lungs unless they use the oxygen thing to go underwater
Which of these adaptations enables a fish to live underwater?
gills
Why don't grasshoppers have gills?
As grasshopper don't live underwater they don't need gills.
How can fish live in water?
They have gills which enable them to breath underwater.
Why can't a fly live underwater?
It doesn't have gills and has to breathe air.
Why does fish have to live in water?
They don't have lungs, they have gills. In simple terms, they don't have the right 'equipment' to breathe on land. Just like humans can't breathe underwater.
How long is a giant scorpion?
3 feet, and have gills and live underwater! Does this answer your question?
Do you need to have gills to breathe underwater?
Yes, you do need gills to breathe underwater. Gills process the water through them that makes the water allowed to go through the animal's body without drowning them. Gills are the only thing that keep the animals that live underwater, alive. they also don't make you breath the air in-you breath the oxygen in the water!
Does seahorses have a gill?
There gills are located at the back of their heads
Why can't you live underwater?
People can not breathe water. We have lungs rather than gills.
What fish characteristics do seahorses have?
Seahorses are fish that live underwater and breath with gills, and have fins.
Do have gills?
no only fish have gills or underwater things
