The waste products of metabolism Tends to accumulate and from it They must be excreted In simpler organisms In which circulatory system are not developed The tissue fluid is the dominant fluid Waste restricts of body pass slowly Along the tubules To be eliminated at the exterior of the worm The rotting flesh can't be consumed The rotting blood can't be excreted While cadaver waits in his grave No oxygen and food to cells Dead mechanism of the body consumer Go to the grave Eat across the mud Visceras