Why isn't the mouth and its extensions timetabled as an internal body cavity?
Answers: Ethel's right. Technically, we are like a stack of donuts or tires, and the inner canal of the body, the alimentary waterway of the digestive system, is no more inside the body than a pencil standing up in a stack of donuts is within the substance of the donut. Your poop was never contained by you. Just the absorbed nutrients get in.
Internal body cavity like the peritoneal cavity, the pericardial cavity and the pleural cavity are sealed sour - like flattened baloons.
The mouth is a cavity, however, newly not an internal one: http://www.infovisual.info/03/054_en.htm...
Because it isn't inside out bodies! Really, the mouth to the anus is a tunnel through our body, with the insides outside of our body. Our integument is continuous to hang on to the outsides out even though our digestive system is able to create a special environment for absorbing foods. Poops to you!
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