AP BIOLOGY

Detailed explanation-1: -The contractile vacuole (CV) complex is an osmoregulatory organelle of free-living amoebae and protozoa, which controls the intracellular water balance by accumulating and expelling excess water out of the cell, allowing cells to survive under hypotonic stress as in pond water.

Detailed explanation-2: -A contractile vacuole (CV) is a sub-cellular structure (organelle) involved in osmoregulation. It is found predominantly in protists and in unicellular algae.

Detailed explanation-3: -contractile vacuole, regulatory organelle, usually spherical, found in freshwater protozoa and lower metazoans, such as sponges and hydras, that collects excess fluid from the protoplasm and periodically empties it into the surrounding medium.

Detailed explanation-4: -As water enters the cell, the contractile vacuole expands. Then when there is too much water in the cell, the contractile vacuole contracts, expelling excess water along with waste products and pushing them out of the cell.

Detailed explanation-5: -Contractile vacuoles protect a cell from absorbing too much water and potentially exploding by excreting excess water. Wastes, such as ammonia, are soluble in water; they are excreted from the cell along with excess water by the contractile vacuoles.