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small fluid-filled sacs that store, transport, or digest cellular products and waste.
the membrane that surrounds the nucleus. It is similar in structure and function to the cell...
any disease that is caused by a virus or a bacterium or any other micro-organism.
the part of the cell that controls all the activities of the cell and plays an important role in...
the gradual wasting away of the body caused by severe malnutrition, in the form of inadequate...