Why must the body get rid of wastes?

Answer 1

Quite a simple thing when you think of it. Our bodies are only so large, and can only store so much waste. Whatever we eat undergoes mechanical digestion in the mouth with the teeth and saliva. It then travels to the stomach where enzymes break it down further in mechanical digestion. Once in reaches the small intestines, it goes through chemical digestion, where polymers are broken down into monomers. At this point, the kidney takes whatever it thinks the body needs and dumps everything it doesn't need or has already used. All this excess waste travels to the large intestine, where it turns into feces and urine. The urine contains all of the used liquids we no longer can use for benefit, and the feces is, well... the waste that is simply solid material unable to be converted into energy or has already gone through the process. All the waste lies in the rectum, and the rectum is only so large, and will eventually fill up. When this time comes, your body sends a signal to your brain to empty your rectum, and you excrete feces. On the other hand, the urine fills up in the bladder, and sits there for quite a while until your bladder fills up as well. Your excretory system has both voluntary and involuntary reactions. You don't always have to think to keep your rectum closed, but you can choose to open it in a time of need. That is why you have to excrete body wastes; to remove excess material consuming the body's capacity.

Answer 2

If you did not, toxic chemicals such as urea (which is excreted in urine) would build up in your blood and you could not survive.

Not all of your food and water that you eat can be used (e.g. fibre) - it has to be removed somehow.

Answer 3

this of it this way....

imagine at you house you could never have you garbage picked up by the county nor could you take it to the dump it will start to build up and build up soon you can't do anything because you run out of room and pests and insects will take over your house

well the same would go for your body except instead of pests and insects it would be disease and bacteria

Answer 4

if we did not excerte (poop) than our stomach or bladder will fill up and you will evenualy feel ill and die! :)

Answer 5

Because if you kept eating without eliminating the waste products, you'd eventually explode.

Answer 6

Because they r harmful and have to be removed