[Acid phosphatase activity during digestion in the anintestinal turbellaria Convoluta convoluta].

Studies have been made on changes in the activity of acid phosphatase during the digestion in the turbellaria C. convoluta. The increase of the enzymic activity of cytoplasm of the peripheral parenchyma at the initial stages after feeding (6 hours, 1 day) and gradual decrease of this activity at later stages (2,4 and 7 days) were noted. The presence of acid phosphatase in the nuclei and cytoplasm of cells of the central parenchyma at all stages of the digestive cycle is explained by degeneration of these cells which is associated with holocrine secretion of the digestive enzymes.