Whales have some flappy thing around their blow hole that they seal shut when under water only to open once above. I’m not aware of something like this for humans, yet the air does not gush out when we go underwater
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Typically when a human is underwater, air is trapped in, or rather water trapped out of the nose because we like to keep our head up above our feet. If you swim down without plugging your nose, water will fill your sinus cavity and air will escape.
You can form an airtight seal with your lips to keep water out and air in your mouth and if you’re not swallowing or breathing water won’t just go down your throat.
Your nose is full of air and points down. Full your sink with water and grab a glass and shove it in the water opening down. It won’t fill with water because the air can’t escape because air won’t sink in the water. That’s how your nose works. If you flip upside down under water without blowing out your nose it will fill with water.
Typically when a human is underwater, air is trapped in, or rather water trapped out of the nose because we like to keep our head up above our feet. If you swim down without plugging your nose, water will fill your sinus cavity and air will escape.
You can form an airtight seal with your lips to keep water out and air in your mouth and if you’re not swallowing or breathing water won’t just go down your throat.
Your nose is full of air and points down. Full your sink with water and grab a glass and shove it in the water opening down. It won’t fill with water because the air can’t escape because air won’t sink in the water. That’s how your nose works. If you flip upside down under water without blowing out your nose it will fill with water.
Typically when a human is underwater, air is trapped in, or rather water trapped out of the nose because we like to keep our head up above our feet. If you swim down without plugging your nose, water will fill your sinus cavity and air will escape.
You can form an airtight seal with your lips to keep water out and air in your mouth and if you’re not swallowing or breathing water won’t just go down your throat.
Your nose is full of air and points down. Full your sink with water and grab a glass and shove it in the water opening down. It won’t fill with water because the air can’t escape because air won’t sink in the water. That’s how your nose works. If you flip upside down under water without blowing out your nose it will fill with water.
Humans can hold their breath underwater by closing their glottis, a part of the airway that connects the throat to the lungs. When you take a deep breath and hold it, the air fills up the lungs, and then the glottis closes, sealing off the airway so that air cannot escape. The air trapped in the lungs provides oxygen for the body until you can breathe again.
The epiglottis, which is a flap of cartilage at the base of the tongue, helps prevent water from entering the airway and lungs by closing off the windpipe when you swallow. This prevents food and liquids from entering the airway and lungs.
Humans can hold their breath underwater by closing their glottis, a part of the airway that connects the throat to the lungs. When you take a deep breath and hold it, the air fills up the lungs, and then the glottis closes, sealing off the airway so that air cannot escape. The air trapped in the lungs provides oxygen for the body until you can breathe again.
The epiglottis, which is a flap of cartilage at the base of the tongue, helps prevent water from entering the airway and lungs by closing off the windpipe when you swallow. This prevents food and liquids from entering the airway and lungs.
Humans can hold their breath underwater by closing their glottis, a part of the airway that connects the throat to the lungs. When you take a deep breath and hold it, the air fills up the lungs, and then the glottis closes, sealing off the airway so that air cannot escape. The air trapped in the lungs provides oxygen for the body until you can breathe again.
The epiglottis, which is a flap of cartilage at the base of the tongue, helps prevent water from entering the airway and lungs by closing off the windpipe when you swallow. This prevents food and liquids from entering the airway and lungs.
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