describe the holozic nutrition in amoeba with labbel digraam
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Amoeba is a unicellular animal . Amoeba eats tiny plants and animals as food which float in water in which it lives. The mode of nutrition in Amoeba is holozoic . The various steps involved in the nutrition of amoeba are : ingestion , digestion , absorption , assimilation and egestion . They are described below :-
Amoeba has no mouth or a fixed place for the ingestion of food . Amoeba ingest food food by using its pseudopodia . When a food particle comes near amoeba , then amoeba ingests this food particle by forming temporary fingerlike projections pseudopodia around it .
In Amoeba , food is digested in the food vacuole by digestive enzymes . The enzymes from surrounding cytoplasm enter into the food vacuole and break down the food into small and soluble molecules by chemical reactions .
The digested food present in the food vacuole of amoeba is absorbed directly into the cytoplasm of amoeba cell by diffusion . Since amoeba consists of only one small cell , it does not require blood system to carry the digested food . After absorption of food, the food vacuole dissapears.
A part of the food absorbed in Amoeba cell is used to obtain energy through respiration. The remaining part of absorbed food is used to make the parts of Amoeba cell which lead to the growth of Amoeba .
Amoeba has no fixed place (like anus) for removing the undigested part of food . When a considerable amount of undigested food collects inside Amoeba , then its cell membrane suddenly ruptures at any place and the undigested food is thrown out of the body of Amoeba .
