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Circulatory System

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The Circulatory System Types of circulation: Gastrovascular cavities- Digests and distributes nutrients throughout the body of hydras and cnidarians. Open circulatory system- Blood and interstitial fluid are separated. This fluid is called hemolymph. The heart(s) pump hemolymph into sinuses where chemical exchange occurs between hemolymph and body cells. Open circulatory systems are in insects and arthropods. Advantages of an open circulatory system are less energy costly because of their low hydrostatic pressures and need less energy to maintain because they have no blood vessels.

Comparison of Cell to a Restaurant

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Francesca Cigliano October 24, 2010 Biology/ P. 3 When analyzed, one can see how a plant cell and an everyday restaurant are very similar; the plant cell?s organelles function similarly to specific jobs in the restaurant. The function of the nucleus of a plant cell is to control all activities of a cell (also known as the ?control center? of a cell). This can be compared to a manager in a restaurant. A manager controls the staff of the restaurant and is in charge of all activities occurring in a restaurant.

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