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Topic:
How does an amoeba obtain its food?
Subject: Science
Class: 9th
- An amoeba is a type of unicellular organism, more specifically eukaryotic unicellular organism.
- The name amoeba is derived from the Greek word "Amoibe" meaning change.
- Being a single-celled organism, its requirement for food is not much. An amoeba obtains its food via a special kind of body structure known as pseudopodium.
Title
- Pseudopodium or pseudopodia is a hand or leg-like structure emerging from the body of the amoeba at any point.
- It emerges from the eukaryotic cell membrane and contains cytoplasm.
- When the food is near the amoeba, the part of the body nearest to the food extends two pseudopodia around the food to engulf it.
- When the food is between those two pseudopodia, they close themselves and a food vacuole is formed in which the food is trapped along with some water.
- Now, the food is present inside the vacuole which is inside the body of the amoeba. The food vacuole contains digestive enzymes which break down the food into nutrients and undigested waste.
- The nutrients from the food are directly absorbed by the body of the amoeba, the cytoplasm.
- After digestion of the nutrients, only the undigested waste remains. This undigested waste is thrown out of the body of the amoeba by a rupture anywhere across the cell wall of the amoeba.
- After the food is digested and the waste is thrown out, the vacuole disappears.
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