Honorable mention: Mast cell in human eye with conjunctivitis. This image shows a single mast cell invading conjunctival tissue in response to an inflammatory agent or pathogen. The mast cell contains vesicles of histamine (red dots). Mast cells are among the first cells of the immune system to react to the presence of an invading pathogen and they facilitate the movement of leukocytes (white blood cells) and other immune cells toward the site of infection. Donald Pottle, The Schepens Eye Research Institute, Boston, Massachusetts. (Olympus BioScapes)
Honorable mention: Underwater image of live coral Montastraea annularis. Note polyp tissue (green) around the mouth and base of the tentacles and zooxanthellae (red fluorescence from chlorophyll) in the tissue between polyps. James Nicholson, NOAA/NOS/NCCOS Center for Coastal Environmental Health & Biomolecular Research, Fort Johnson Marine Lab, Charleston, South Carolina. (Olympus BioScapes)
Tenth prize: Spherical colonies of Nostoc commune, a bluegreen alga, by Gerd Guenther, Duesseldorf, Germany. (Olympus BioScapes)
Honorable mention: Two damsel bugs (Nabis sp.) seemingly feeding on an aphid by Geir Drange of Asker, Norway. The backdrop is a dried Norway maple leaf. (Olympus BioScapes)
Honrable mention: Sporangium of the slime mold Craterium minutum, by Dr. Dalibor Matýsek, Mining University – Technical University of Ostrava, Ostrava, Czech Republic.
Honorable mention: Detail of a pod of the flowering legume Scorpius muricatus (common name “Prickly Caterpillar”), by Viktor Sýkora, from Hyskov, Czech Republic. (Olympus BioScapes)
Honorable mention: Dried thorax scales of the Weevil Eupholus, by Dr. Douglas Clark, from San Francisco, California. (Olympus BioScapes)
Honorable mention: Protozoan Elphidium crispum found growing on the Dorset coast of England, by Michael Gibson of Northampton, UK. (Olympus BioScapes)
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