Mother nature encompasses alluring, enchanting organisms 1 can consider. These creatures may possibly vary from smallest protozoans to greatest mammals. All the creatures have to have food for acquiring strength. The process of capturing food differs in various group of taxa. The way in which the protozoans devour their prey is also impressive. The system of acquiring nutrition is also remarkable. Nutrition is a approach of getting food in and digesting it and assimilating it to receive strength. The approaches in which the protozoans receive their nourishment also varies dramatically. They stand for almost just about every kind of nutrition. They may possibly be holozoic, holophytic, parasitic, coprozoic, mixotrophic, saprozoic.

1.Holozoic Nutrition
The majority of Protozoans nourish themselves in the method as the increased organisms did. They are capable to feed on many micro-organisms, rotifers, crustaceans, other protozoans etc. These kinds of protozoans are termed as Holozoic. They may possibly be carnivorous, herbivorous, omnivorous or scavangerous. Holozoic nutrtion is also termed as zootrophic nutrition. This kind of nutrition includes a few fundamental steps:

A. Food stuff Capture and ingestion
The frequent process of food consumption is also termed as phagocytosis, which differs drastically in various lessons of protozoa. The locomotory organelles perform an significant job in food capture and ingestion. Rhumbler has defined 4 techniques in which the locomotory organelles take part in food capture and ingestion.

This process is very common Amoeba. Here the prey is surrounded by the locomotory organelle termed as pseudopodia from all the sides without having coming in immediate call with the prey and a cup is fashioned. The food cup is afterwards on done by forming a food vacuole enclosing the prey with huge quantity of water.

This process is aided by the locomotory organelles termed as axopodia and reticulopodia for capturing an immobile prey. A food cup is fashioned by immediate call with the prey and cytoplasm flows around the prey for engulfing it.

In this case, the prey is initially killed by a toxin secreted by the pseudopodia and then it is enclosed in the form of a food vacuole along with cytoplasm.


In this case, the passive prey like the filamentous alga is merely drawn into the overall body upon call and ingested. The basic overall body area plays an significant job in this approach.

B. Digestion and Assimilation

Digestion is often intracellular. The food vacuole is surrounded by a movie. Acids, alkalies and enzymes are poured more than the food to guarantee digestion. The reaction is initially acidic then alkaline. The prey is killed in the acidic setting which lasts for four-sixty minutes. Digestion mostly happens in the alkaline stage. The digestive enzymes are aided by the lysosomes. Protein splitting proteases and starch splitting amylases are of vast incidence. The presence of extra fat splitting lipase is controversial.

C. Egestion

In bare types like Amoeba, the undigested make any difference goes out from the hinder section of the overall body. In some ciliates egestion happens via a long-lasting opening existing at the posterior stop of the overall body termed as cytopyge.

two.Holophytic Nutrition
This manner of nutrition is also termed as autotrophic nutrition. This is very common in chlorophyll bearing flagellates. These organisms carry out photosynthesis with the help of carbon dioxide, water and chlorophyll. The oxygen is liberated and the remaining carbon is used for producing food. The starch is stored in the form of amylum but in Euglena it is stored in the form of paramylum which is not colored blue with iodine. Particular protozoans dwelling symbiotic green alga that carry out photosynthesis and provides food to them.

three.Saprozoic Nutrition

This manner of nutrition is also termed as osmotrophy. Here the flagellates that are in immediate call with the natural make any difference of the decomposed crops and animals receive their nourishment. They receive their food in the form of dissolved materials.

This is also termed as cell ingesting.It was initially analyzed by Mast and Doyle in 1934 in Amoeba proteus. Pinocytotic channels are fashioned in the overall body for absorbing liquid food from the bordering medium. This process aids the organism in acquiring increased molecular compounds from the bordering medium.

5.Parasitic Nutrition
The Sporozoans are absolutely parasitic and receive their nourishment by residing as parasites in the overall body of other animals. They slide below two categories:

They feed on the uncooked or digested materials of the host in saprozoic method. They are harmless endocommensals. E.g., Nyctotherus, Balantidium

About 26 species of protozoa are identified to be parasitic to people. They are accountable for triggering dreadful diseases like Sleeping sickness, Malaria etc.

six.Coprozoic Nutrition

Numerous free residing Protozoans feed on the faecal make any difference of other animals and are termed as coprozoic. Eg., Cercomonas etc.

seven.Mixotrophic Nutrition

Quite a few Protozoans are capable to get their nutrition in a lot more than 1 way. Euglena gracilis is capable to acquire nutrition both holophytically as very well as saprozoically.

Regardless of what may possibly be suggests of devouring food all leads to adaptation to colossal setting.