Micro World

How small is Euplotes?

Euplotes has a body length of about 100 µm.

What is measured: ciliate protozoan with fused cirri

Euplotes (100 µm) drawn to scale beside a human hair (70 µm) and a human egg cell (115 µm)
Drawn to scale, from left to right: Human hair (70 µm), Euplotes (100 µm) and Human egg cell (115 µm).

Compare

How big is that, really?

  • About 87% of the width of a human egg cell
  • About 1.4× the width of a human hair
  • About 5× the width of a cloud droplet
  • About 5 would fit across a grain of sand
  • About 13× the width of a red blood cell

Learn

Facts about Euplotes

Euplotes uses fused bundles of cilia called cirri to crawl along surfaces like tiny legs.

Source: Protist Information Server, Euplotes

Micro World

NameSizeCompared with Euplotes
Ascaris lumbricoides Egg60 µm0.6×
Human Cheek Epithelial Cell60 µm0.6×
Pine Pollen Grain70 µm0.7×
Human Adipocyte100 µmsame size
Euplotes100 µmthis page
Human Cardiomyocyte100 µmsame size
Human Smooth Muscle Cell100 µmsame size
Onion Epidermal Cell100 µmsame size
Didinium150 µm1.5×
Coscinodiscus Diatom150 µm1.5×

Test your sense of scale

Which is bigger: Euplotes or Pine Pollen Grain?

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