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                                    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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Answer»  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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