nutrition in amoeba | real under microscopic view | digestion absorption | excretion

Nutrition in Amoeba:
Amoeba does not have any specialized organ for nutrition.
The entire process is carried through the body surface with the help of pseudopodia.
Nutrition in an Amoeba occurs through a process called phagocytosis.
Phagocytosis is the process by which the food is engulfed by the organism.
The mode of nutrition in amoeba is known as holozoic nutrition.
It involves the ingestion, digestion and egestion of food material.
Holozoic nutrition:
Ingestion
Ingestion is the process of taking in the food into the body either by swallowing or absorbing it.
Amoeba pushes out the pseudopodia to encircle the food and engulfs it forming a food vacuole.
Digestion
In amoeba, the food vacuoles are transported deeper into the cell and with the help of the digestive enzymes, the large insoluble particles are broken down to the simplest molecules.
Absorption
In this process of absorption, the nutrients from the digested food material are absorbed into the cell’s cytoplasm by leaving behind the undigested particles. This process is called diffusion.
The excess food is stored in the form of glycogen and lipids.
Assimilation
Assimilation is the process of obtaining energy from the absorbed food molecules.
In amoeba, absorbed food molecules are utilized for producing the energy required to carry out different life processes within the cell.
Egestion
Egestion is the process of excretion of undigested food material.
In amoeba, this process is carried out by rupturing the cell membrane to remove the undigested food material from its body

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