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Artificial gills are hypothetical devices to allow a human to be able to take in oxygen from surrounding water. This is speculative technology that has not yet been demonstrated. Natural gills work because most animals with gills are thermoconformers (cold-blooded), so they need much less oxygen than a thermoregulator (warm
"I'm the commander, see.I don't need to explain—I do not need to explain why I say things. That's the interesting thing about being the President. Maybe somebody needs to explain to me why they say something, but I don't feel like I owe anybody an explanation."
The gills are composed of comb-like filaments, the gill lamellae, which help increase their surface area for oxygen exchange. [5] When a fish breathes, it draws in a mouthful of water at regular intervals. Then it draws the sides of its throat together, forcing the water through the gill openings, so it passes over the gills to the outside.
“Maybe the reason why we have this condition in humans is because of this trade-off that our ancestors made 25 million years ago to lose their tails,” Yanai said.
A Business Insider video about preauricular sinus points out that evolutionary biologist Neil Shubin suspects "these holes could be evolutionary remnant of fish gills."
Image credits: Savior-_-Self #2. That expensive coffee made from beans collected from animal droppings. Who the hell looked at that and said "Why not? Let's give it a go.".
Pharyngeal clefts resembling gill slits are transiently present during the embryonic stages of tetrapod development. The presence of pharyngeal arches and clefts in the neck of the developing human embryo famously led Ernst Haeckel to postulate that " ontogeny recapitulates phylogeny "; this hypothesis, while false, contains elements of truth ...
But these images don’t come from nowhere: so many of us find pleasure in gathering around a table brimming with food, whether that’s during the holidays, on vacation, or at a Saturday night ...