Paramecium is a tiny unicellular organism found in water. It follows holozoic mode of nutrition.
Paramecium engulfs food by the use of cilia. Cilia is a hair like structure present on surface on body of paramecium. Food is ingested by cilia through oral groove into gullet. The food is ingested with a little surrounding water to form a food vacuole
In Paramecium, food is digested in food vacuole by the digestive enzymes released by cytoplasm. Digestion in Paramecium is termed as “intracellular digestion”.
The digested food present in the food vacuole of Paramecium is absorbed directly into the cytoplasm by diffusion. After absorption of food, the food vacuole shrinks.
The absorbed food nutrients is stored and utilised later for synthesis of energy.
The undigested food is expelled out through anal pore.