amoeboid locomotion

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amoeboid locomotion

biology

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July 22, 2026

Quick Summary

Amoeboid locomotion is a method of movement used by some microorganisms, most notably amoebas, which are a type of protist. This type of movement is characterized by the formation of temporary extensions of the cell's cytoplasm called pseudopodia.12

How it Works

The process involves the flow of cytoplasm within the cell. Proteins like actin and myosin polymerize at the leading edge of the cell, causing the cytoplasm to flow into this area and extend the pseudopodium. This cytoplasmic flow propels the organism forward. In essence, the cell extends a part of itself, anchors it, and then pulls the rest of its body along. This sliding or crawling motion is distinct from the whip-like movements of flagella or the rowing motions of cilia. Pseudopodia are also crucial for feeding in many of these organisms.132

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amoeba
This type of movement, called amoeboid movement, is considered to be the most primitive form of animal locomotion.
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This type of movement, called amoeboid movement, is considered to be the most primitive form of animal locomotion.
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muscle
Amoeboid motion
Amoeboid movement occurs as an extension of the cytoplasm, called a pseudopod (“false foot”), flows outward, deforms the cell boundary, and is followed by the rest of the cell. Many pseudopodia may be formed at the same time, and their actions do not seem to be…
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Amoeboid movement occurs as an extension of the cytoplasm, called a pseudopod (“false foot”), flows outward, deforms the cell boundary, and is followed by the rest of the cell. Many pseudopodia may be formed at the same time, and their actions do not seem to be…
Read More

protist
Pseudopodia
…cilia, pseudopodia are responsible for amoeboid movement, a sliding or crawlinglike form of locomotion. The formation of cytoplasmic projections, or pseudopodia, on the forward edge of the cell, pulling the cell along, is characteristic of the microscopic unicellular protozoans known as amoebas. Such movement, however, is not exclusive to the…
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…cilia, pseudopodia are responsible for amoeboid movement, a sliding or crawlinglike form of locomotion. The formation of cytoplasmic projections, or pseudopodia, on the forward edge of the cell, pulling the cell along, is characteristic of the microscopic unicellular protozoans known as amoebas. Such movement, however, is not exclusive to the…
Read More

protozoan
Amoeboid movement
Amoeboid movement is achieved by pseudopodia and involves the flow of cytoplasm as extensions of the organism. The process is visible under the light microscope as a movement of granules within the organism. The basic locomotory organelle is the pseudopodium. The way in which movement is…
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Amoeboid movement is achieved by pseudopodia and involves the flow of cytoplasm as extensions of the organism. The process is visible under the light microscope as a movement of granules within the organism. The basic locomotory organelle is the pseudopodium. The way in which movement is…
Read More