The basic process of digestion of food and release of energy is the same in amoeba as well as in human beings in amoeba, Digestive juices are secreted into the food vacuole. They act on the food and break it down into simpler substances. Gradually the digested food is absorbed. Similarly, in human beings various digestive juices (mouth, stomach, intestine, etc.) act on food and break it down to simpler substances.
Difference : The digestion process in amoeba is simple while in human beings it is a complex process. The process of ingestion and egestion are quite different. Amoeba engulf its food by surrounding the food particle with its pseudopodia. The undigested food which is largely carbondioxide gas is expelled out side by the vacuole. While in human beings, the food (which is complex substance) is taken inside the mouth and undergoes a complex process of digestion and absorption. Finally the undigested food it expelled in the form of faeces.
