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Micro World

How small is Blepharisma japonicum?

Blepharisma japonicum has a body length of about 300 µm.

What is measured: pink ciliate protozoan, body length

Blepharisma japonicum (300 µm) drawn to scale beside a human egg cell (115 µm) and a grain of sand (500 µm)
Drawn to scale, from left to right: Human egg cell (115 µm), Blepharisma japonicum (300 µm) and Grain of sand (500 µm).

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How big is that, really?

  • About 60% of the width of a grain of sand
  • About 2.6× the width of a human egg cell
  • About 4.3× the width of a human hair
  • About 6 would fit across a raindrop
  • About 15× the width of a cloud droplet

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Facts about Blepharisma japonicum

Blepharisma gets its pink color from a light-sensitive pigment called blepharismin, which can be toxic in bright light.

Source: Protist Information Server: Blepharisma; Encyclopedia of Life: Blepharisma japonicum

Micro World

NameSizeCompared with Blepharisma japonicum
Human Adipocyte100 µm0.33×
Euplotes100 µm0.33×
Human Cardiomyocyte100 µm0.33×
Human Smooth Muscle Cell100 µm0.33×
Onion Epidermal Cell100 µm0.33×
Didinium150 µm0.5×
Coscinodiscus Diatom150 µm0.5×
Human Purkinje Cell250 µm0.83×
Blepharisma japonicum300 µmthis page
Chaos carolinense1 mm3.3×

Test your sense of scale

Which is bigger: Blepharisma japonicum or Human Purkinje Cell?

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