1. Why is the inside of the digestive system not really "inside” your body?

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The digestive system is really just a tube that begins at your mouth and ends at the rectum. Most of it is filled with bacteria compared to the other parts of your body which are usually sterile with no bacteria.

Explanation:

six grader is what i am ssorry

answer: the correct option is d. enzyme

lactase and carbonic anhydrase are the examples of enzymes.

lactase is an enzyme, which is present in the small intestine of mammals. it in the digestion of the disaccharide, lactose ( milk sugar) by converting it into two monosachharide, which are glucose and galactose.

carbonic anhydrase is present in the red blood cells. this enzyme plays significant role in the transport of co₂. it in the conversion of co₂ and h₂o into carbonic acid, which is then dissociated into bicarbonate ions and hydrogen ions.