Pine Pollen Grain有多小？70 µm，按比例对比

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Pine Pollen Grain（70 µm）与a human hair（70 µm）和a human egg cell（115 µm）按真实比例并排绘制 — 按比例绘制，从左到右依次是：Pine Pollen Grain (70 µm)、Human hair (70 µm)和Human egg cell (115 µm)。

比较

它实际有多大？

About the same width as a human hair
About 61% of the width of a human egg cell
As wide as about 3 cloud droplets side by side
About 7 would fit across a grain of sand
As wide as about 9 red blood cells side by side

了解更多

关于Pine Pollen Grain的资料

Pine pollen grains have two air-filled sacs that act like tiny balloons, helping them travel long distances on the wind.

来源：Palynology databases, PalDat; USDA Forest Service

Micro World

名称	尺寸	与Pine Pollen Grain对比
Dandelion Pollen Grain	35 µm	0.5×
Tetrahymena thermophila	50 µm	0.71×
Ascaris lumbricoides Egg	60 µm	0.86×
Human Cheek Epithelial Cell	60 µm	0.86×
Pine Pollen Grain	70 µm	本页面
Human Adipocyte	100 µm	1.4×
Euplotes	100 µm	1.4×
Human Cardiomyocyte	100 µm	1.4×
Human Smooth Muscle Cell	100 µm	1.4×
Onion Epidermal Cell	100 µm	1.4×

测测你的尺度感

哪个更大：Pine Pollen Grain还是Tetrahymena thermophila？

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