the.com/excretion
The body's quiet janitor, hauling out the trash so you don't have to think about it.
means The process of removing metabolic waste products from an organism to keep its internal chemistry from poisoning itself.
from From Latin excernere, to sift out or separate — the same root that sorts wheat from chaff, applied to biology's leftovers.
Not the sameExcretion is metabolic waste, not undigested food.
Lungs countExhaling carbon dioxide is technically excretion.
Sweat dutySkin excretes salt, urea, and water through sweat.
Kidney filterKidneys process about 180 liters of blood daily.