what happens inside your body when you don't drink water

[00:00:00]Switch to a world where every drop counts. Mouth becomes dry as saliva production [music] drops. Kidneys begin to conserve vital fluids. Dehydration takes hold.

[00:00:20]>> This is your brain on water. When hydration drops, tissue literally shrinks. Neural pathways slow down, triggering fatigue. Blood vessels dilate, causing pain. This is the anatomy of a headache.

[00:00:30]>> When water is scarce, the kidneys work harder. They reabsorb water back into the blood, resulting in [music] highly concentrated urine.

[00:00:40]>> Dehydration strikes the muscles first.

[00:00:42]Blood thickens, slowing circulation to a crawl. Vital organs begin to shrink and fail. The brain itself loses volume.

[00:00:48]Every cell pleads for water.

[00:00:55]Your body needs water to survive.