Cells and organisms

Expedition Probes Ocean’s Smallest Organisms for Climate Answers - NASA

The Oldest Organisms In The World

infusorium Ciliophora of the genus Paramecium under a microscope, order Peniculida. Cilia help to move, feeds on bacteria and other small organisms. Planktonic organism

Closeup of a barnacle using its feathery tentacles to capture plankton and other small organisms as it feeds taking advantage of the nutrientrich waters brought in by the tide.

Microscopic Organisms in a Drop of Pond Water

Unseen Life Forms: The Incredible Microscopic Universe