Streaming of protoplasm, peristalsis, walking, running, etc. Which of the above-mentioned movements are internal?

Monjur Alahi

Streaming of protoplasm, peristalsis, walking, running, etc. Which of the above-mentioned movements are internal? Which are external? Can you add few more examples?


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Salim Ahmed Kawsar

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1. Streaming of protoplasm, peristalsis are internal movements. Walking and running are external movements. 

2. Examples of internal movement: 

Contraction and relaxation heart, inspiration and expiration, contraction of blood vessels, etc. 

3. Examples of external movement: 

Swimming; movement tongue, jaws, snout, tentacles, movement of ear pinna, etc.

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