Digestive System Description
By isaaclewis, Updated
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Mr., you need to redeem yourself. Our T.V. Show does not want 3 episodes about how yodeling is science.!!! Make another video!!!!
How about the digestive/excretory system?
I will talk about the digestive/excretory system now. So, people box up products then they send it down the conveyor belt. Just like how the mouth chews up food, then chewed up food goes down the esophagus. The mouth uses chemical digestion as well as mechanical digestion
Trying to work here!!!
You bladder works like a balloon. As it gets more urine, the bigger it gets. After a while the brain sends signals to your bladder to squeeze, and your sphincters to relax. Then, urine goes down the uretha to the outside world.
This part of the factory marks boxes so they can go to the right place, like to a person's house. This is like the stomach because the stomach turns chewed up food into chyme by using acids. The stomach does this so that food can go through the digestive system easily.
The kidney removes a poison called urea, salt, and water that we do not need. These material together are urine. Urine goes down ureters to the bladder. This is just like a bus which picks up people and sends them down the road the the next stop.
Sphincters are muscles that keep urine from leaking out of the bladder. This is just like how police men keep inmates from escaping prison.
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