THE EXCRETORY SYSTEM/EL APARATO EXCRETOR

APARATO EXCRETOR
MÁS SOBRE EL EXCRETOR


 Excretion is the elimination of waste substances produced by the activity of the body’s cells, and of some substances of which there is an excess. There are several organs and systems related to excretion( the liver, the lungs, the sweat glands), but the most important is the excretory system.



Observe carefully the below pictures and color in red the vessels with oxygenated blood, and in blue those whith non-oxygenated blood




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