Insensible fluid loss

Insensible fluid loss , is not readily seen or felt fluid, excreted from the body.

Insensible fluid loss consists of 1)vaporization from lungs ( exhaled watervapor)

and 2) passive diffusion through skin ( also called perspiratio insensibilis = insensible perspiration ). All values below are for adult humans:

Vaporization from lungs : average amount 300 ml. , will increase with hard physical work and in dry hot climate.

Insensible perspiration : average amount 350 ml. .

Other ways of fluid excretion, that are not insensible fluid loss :

Urinary production ( of urine ) can be seen : average amount daily 1000 - 1500 ml - will increase if you are overhydrated - and decrease if you are dehydrated.

Active sweating from sweat glands can be seen : average amount daily 150 ml. , will increase in case of physical hard work or high temperatures.

Fluid lost to the fecal matter in the intestines : average amount daily : 150 ml. , but will increase in case of Diarrhea.