What process does water enter the blood?
Water that you drink, like all nutrients, enters the blood in
the digestive tract. Water is different for example from proteins
and fats in that it gets absorbed throughout the digestive tract
and not only in a particular part such as the stomach or a part of
the intestines. The major site of water readsorption from the
intestines however is the large intestine (colon). Here, the
removal of water and uptake into the blood contributes towards
drying and concentrating the stool.