Unformatted text preview: contractile vacuole ; the concentration of solutes in the cytoplasm is greater than that in the surrounding fresh water, so water tends to enter the cytoplasm by osmosis* via the partially permeable cell membrane. This excess water collects in the contractile vacuole which swells and discharges its contents to the outside from time to time. Structure of an amoeba pseudopodium ; a protuberance from the surface of the amoeba into which the cytoplasm flows; in this way the amoeba moves about over the mud at the bottom of the pond. ( pseudopodium means ‘false foot’) food vacuole; microscopic organisms are taken into the cytoplasm with a drop of water forming a temporary vacuole; these organisms are then digested. © D.G. Mackean 0.1mm * Osmosis is the movement of water from a weak solution to a stronger solution through a partially permeable membrane. © D.G. Mackean...
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- Fall '11
- Animal Cell, D.G. Mackean, pseudopodium