NIH Director’s Blog Post on this Image
Edna, Gil and Amit Cukierman, Fox Chase Cancer Center, Philadelphia, Pa.
Download hi-res image [56 MB]
Those of us who get sneezy and itchy-eyed every spring or fall may have pollen grains, like those shown here, to blame. Pollen grains are the male germ cells of plants, released to fertilize the corresponding female plant parts. When they are instead inhaled into human nasal passages, they can trigger allergies.
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This page last reviewed on
9/17/2020 12:30 PM
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