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CBSE - VII
Digestion in Amoeba
Digestion in Amoeba
The amoeba is a microscopic unicellular organism.
Lesson Demo
The amoeba is a microscopic unicellular organism. It is belongs to the group protozoa. The name comes from the Greek word amoibe, meaning change.
The habitat of the amoeba is fresh water. The amoeba contains jelly-like cytoplasm. Inside the cytoplasm are cell organelles like the nucleus, food vacuoles and contractile vacuole.
An amoeba takes in oxygen gives off carbon dioxide through the cell membrane by a mechanism of diffusion. It takes in oxygen dissolved in water.
An amoeba can move all directions and can change its shape with the help of pseudopodia as a locomotary organ.
An amoeba engulfs its prey along with a droplet of water with the help of pseudopodia, and then forms a food vacuole inside the cytoplasm.
The prey can be killed and digested with the help of the digestive juice secreted by the food vacuole. The undigested food is thrown out by changing the shape of the body.
Amoeba forms a cyst in unfavourable conditions.
