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The Digestive System: How It Works
Part 1 of Paper
....er products, and then absorbing the products together with water and salts so they can be used in metabolism.
The individuals of all species contain many different protiens or carbohydrates in the cell walls of bacteria, chitin in the external skeletons of arthropods, and so on and foreign proteins or carbohydrates are.... Part 2 of Paper
.... most higher animals digestion is completed not in the cell in the cavity of a digestive tract (the stomach and intestine). Animals with this type of digestion include crustaceans, insects, cephalopods, tunicates, and all vertebrates. A few animals with digestive tracts also partially digest their food before eating it. Some spiders, for example, pierce their prey with fangs that pump digestive fluids into the victim. This liquefies the softer parts, which the spider then sucks into its stomac.... |
| Number of words: 1022 - Approximate pages: 4 |
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