advertisement
Updated 05 October 2015

What is dehydration?

Dehydration occurs when there is a shortage of water in the body.

0

Dehydration occurs when the body is depleted of water.

In the adult man 65% of the body's mass is made up of water. In obese men the percentage is closer to 55% and in women the respective figures are more or less 10% less than those for men.

Two thirds of the total body water is found within the cells and is called intracellular fluid, and a third is outside the cells (the extracellular fluid). A quarter of the latter is in the plasma (i.e. in the arteries, veins and capillaries) and the rest is found in between the cells (in other words outside the cells, but also outside the blood vessels). This is called the intercellular fluid.

Essential bodily processes such as circulation of the blood, excretion by the kidneys and sweating, need to be maintained and this is not possible if there is a drastic loss of fluids. Cells will dry out and malfunction.

Read more:
Why we need water
Is your child dehydrated?

 
NEXT ON HEALTH24X
advertisement

Read Health24’s Comments Policy

Comment on this story
0 comments
Comments have been closed for this article.

Live healthier

Watch out! »

Gross fungal infections you can pick up at the gym

You go to gym to exercise. But make sure the only thing you pick up is a dumbbell and not one of these gross fungal infections.

Holiday health »

Your 10-step asthma holiday checklist

Don’t let asthma ruin your summer holiday. Whether you are travelling or embracing the summer at home, make sure you plan ahead.