– when a person sweats, where does the fluid come from? For example, when you run and begin to sweat from your forehead, where was the sweat being kept before it comes to the surface and leaves your body?

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– when a person sweats, where does the fluid come from? For example, when you run and begin to sweat from your forehead, where was the sweat being kept before it comes to the surface and leaves your body?

In: Biology

4 Answers

Anonymous 0 Comments

Your bloodstream. Blood is, for the most part, water, and your circulatory system distributes it around your body for a variety of purposes, including use in sweating.

Anonymous 0 Comments

It comes out of your blood. All your bodily fluids come out of your blood. Sweat. Spit… etc… Your kidneys filter your blood and produce copious amounts of urine which, ideally, is quite blood free. You do not have some separate fluid system just for water.

Anonymous 0 Comments

Sweat glands under the skin store small amounts of water which just comes from regular water/liquid you drink.

Anonymous 0 Comments

To help visualize how fluid gets from the blood to the outside of your body through sweat glands, [here is a diagram.](http://images.wisegeek.com/human-skin-diagram.jpg) The cells in the sweat gland take fluid out of the blood and then secrete it on the other side of them as sweat.

All bodily secretions work like this, with the cells that produce the secretion taking the raw materials from the blood.