The gastrointestinal tube is about thirty foot, from mouth to the anus.
The gastrointestinal
tube <span>consists of the oral cavity, pharynx, esophagus,
stomach, small intestine and large intestine. </span>
The function of the gastrointestinal tube is to breakdown the foods into nutrients, and eliminate waste products.
because different scientists have different theories or explainatons on how the universe came into being so that's why the origin of the universe is still a question
hope this helps
Oxygen, Carbon dixoide and nonpolar .
The decomposition of marine plants that depletes dissolved oxygen
