Protozoa in the Pool.

Protozoa in the Pool. Paramecium swimming in fresh water have to deal with constant streaming-in of water by osmosis. If unchecked, this could make them swell and explode. Instead, water is captured by radiating canals into contractile vacuoles that pulse, expelling water with each beat.

Aquaporins (water channels) and Proton Pumps work together to drive water into the contractile vacuoles. Where ions go, water follows!

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16 Responses to Protozoa in the Pool.

  1. Nice!!

    It has been a while since I observed one under the microscope πŸ™‚

    What a dance πŸ˜‰

  2. Rajini Rao says:

    I’m partial to A-moe-ba, myself πŸ˜‰

  3. Rajini Rao says:

    Ion drive sounds like a chic model of sports car. I like it, Nobilangelo Ceramalus .

  4. you really have a nice tools. Where do you take this?

  5. I had a pet paramecium for about five minutes. Then he dried up and exploded. RIP Paramecium. I loveded you…

  6. kuku walia says:

    Rajini Rao I love your work god bless you I can’t stop looking at them………………………..

  7. Rajini Rao : looking at these microscopic worlds i always wondered whether i should think of them as tiny machines or living things. biophysics is freaky in that way. i guess i settled on thinking of it as “life”

  8. Rajini Rao says:

    nomad dimitri , from a biophysical perspective, they are indeed tiny machines, perfected by a few billion years of tinkering and modification πŸ™‚ That’s how I see a collection of tiny perfect parts that managed to somehow fit together to work so beautifully as a whole (against many odds!). Cheers.

  9. kuku walia says:


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