How is saliva so readily produced? Do we just have reservoirs of water in storage somewhere in our head?
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Actually yes we sorta do.
Fell around your mouth. With your tongue or finger. You might notice that on both sides of your tongue, under it there is this firm sponge like structure: This is a salivary gland, you have 3 on both sides of your mouth. Under your tongue, under your back teeth and then kinda behind your jaw and under your ears, to touch it you really need to take your finger deep in to your mouth. In 2020 they discovered totally new organ which was a salivary gland in around your throat near where the ear tubes end.
These a spongy because they contain liquid saliva in reserve. They make this by taking liquid from your blood, which is mostly just water. They work kinda the same way as kidneys or breast tissue, being made of ducts that collect water and whatever else that organ adds to it.
Average human being makes about 1,5 liters of saliva a day, most of it ending back in to our bodies as water.
Oh and… just like kidneys can make stones, so can your salivary glands. I leave it up to you to google about that little fun topic. Just thought to add to your nightmare fuel with this fun little fact.
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