explain nutrition in amoeba.

Amoeba consumes food with the help of pseudopodia. Pseudopodia are temporary finger-like projections of the cell surface, which fuse over the food particle. This results in the formation of a food vacuole.

It is inside this food vacuole that complex substances are broken down into simpler ones. These are then diffused into the cell cytoplasm. The remaining undigested material is thrown out of the cell surface.

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nutrition is amoeba is holozoic. the amoeba takes in food throgh temporary finger like pseudopodia which in turn form food vaculoe in which break down of food takes place and then it is absorbed by the body and difussion  in cytoplasm takes place and the unwanted food materials are thrown out of the body,


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Nutrition in amoeba is called PHAGOCYTOSIS.It,when finds the presence of food near,captures the food by extending its temporary finger like projections called PSEUDOPODIA.It then engulfs this food and form a food vacuole around the food particle from which the essential nutrients are taken into the cytoplasm.The waste food is then eliminated out of its body using pseudopodia extension.

Hope this helps:)

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Amoeba can constantly change its shape. It forms finger-like projections called pseudopodia (meaning false feet).  around its prey and engulfs it. The food thus eaten gets trapped in the food vacuole.   An Amoeba feeds on algae, rotifiers, protozoans, and even other small Amoeba. Digestive juices are secreted inside the food vacuole in an Amoeba. Theses juices act on the food and break it down into smaller components. The digested food is later absorbed by the Amoeba for growth, maintenance, and multiplication. The waste material or undigested food is then expelled out of the body.

 

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Amoeba can constantly change its shape. It forms finger-like projections calledpseudopodia (meaning false feet). around its prey and engulfs it. The food thus eaten gets trapped in the food vacuole. An Amoeba feeds on algae, rotifiers, protozoans, and even other small Amoeba. Digestive juices are secreted inside the food vacuole in an Amoeba. Theses juices act on the food and break it down into smaller components. The digested food is later absorbed by the Amoeba for growth, maintenance, and multiplication. The waste material or undigested food is then expelled out of the body.

 

 

 

So,  Amoeba  has holozoic type of nutrition i.e. food is engulfed and then digested in the cell.

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Amoeba comes under holozoic mode of nutrition in which food is taken in either solid form or liquid form.Food is taken in from any place by means of false foot is called pseudopodia.


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 Nutrition in amoeba is holozoic. Thus, solid food particles are ingested which are then acted upon by enzymes and digested. It is an omnivore, feeding on both plants and animals. Its diet includes bacteria, microscopic plants like the diatoms, minute algae, microscopic animals like other protozoa, nematodes and even dead organic matter.

Since it is a unicellular organism, amoeba does not have any specialised structure or organ for the process of nutrition. It takes place through the general body surface with the help of pseudopodia.

.Ingestion- Ingestion involves taking in of food

 

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detail of  amoeba ingestion by circumvallation

 

Circumfluence

When the prey is inactive and the amoeba rolls over it.

Circumfluence another type of ingestion of amoeba

Egestion

The egestion takes place by exocytosis. There is no particular point from which the egestion takes place. As the amoeba moves forward, the undigested matter is shifted to the back and eliminated as food pellets through a temporary opening formed at any nearest point on the plasmalemma.

stages of egestion in amoeba

Absorption

Since the food on digestion is converted into liquid diffusible form, it is readily absorbed by the cytoplasm. The vacuole becomes progressively smaller as the food is absorbed by diffusion.

Assimilation

All the parts of the cell get the nutrients by the cyclic movement of the cytoplasm called the cyclosis. These nutrients are used to build new protoplasm. In this manner the food is assimilated

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