An amoeba is a little blob of living jelly (protoplasm) that creeps around
by putting out pseudopodia (false feet) and flowing into them. It also uses
pseudopodia to engulf bits of food which are then digested by enzymes
inside the cell. A small bubble (contractile vacuole) in the cytoplasm is
able to squeeze out excess water, from species like Amoeba proteus
which lives in fresh water ponds. Other Amoebae live as parasites inside
animals and may cause disease in man, such as amoebic dysentery caused by
Entamoeba histolytica. If an Amoeba's puddle dries up, it can form
a cyst membrane around itself and wait for conditions to improve before it
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