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Birch pollen grain: size, dimension and comparison

The adopted reference is about 25 µm.

Representative diameter

25 µm = 0.025 mm. A micron (µm) is a millimeter divided by 1,000.

Pollen carries the plant’s male reproductive cells.

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Birch pollen grain, interpreted illustration
Interpreted illustration · dimension stated in the fact sheet.

What does this number measure?

Pollen carries the plant's male reproductive cells. Displayed dimension: representative diameter.

Compare the stated dimensions

The comparison uses the number in each fact sheet: altitude, height, diameter, length or distance, depending on the reference. Two values in metres do not necessarily describe the same property.

Compare with Neutrophil in the explorer →

Source and limitations

Catalogue value to check against the source; not individually audited.

Birch pollen: morphological interpretation of a grain with three equatorial pores, two of them visible, and a finely granular exine. Relief and colours are enhanced for readability; representative diameter.