Question

the no of contractile vacuoles in Paramecium

Answer 1

Contractile vacuoles keep this in check. They expand when water enters (called the diastole) and contract when filled with water, carrying water along with wastes outside of the cell (called the systole). The following image is a paramecium aurelia, a single-celled ciliated protozoa with two contractile vacuoles.

Answer 2

n Paramecium, which has one of the most complex contractile vacuoles, thevacuole is surrounded by several canals, which absorb water by osmosis from the cytoplasm. After the canals fill with water, the water is pumped into the vacuole.