Human blood with red blood cells, 3 T-lymphocytes, and activated platelets. Dennis Kunkel Microscopy, Inc/Visuals Unlimited, Inc.
Ridiculously cool natural phenomena...
Lamprey ~Petromyzon marinus ~Lampreys (sometimes also called lamprey eels) are a family of jawless fish, whose adults are characterized by a toothed, funnel-like sucking mouth.While lampreys are well-known for those species which bore into the flesh of other fish to suck their blood, most species of lamprey are non-parasitic and never feed on other fish. In zoology, lampreys are sometimes not considered to be true fish because of their distinctive morphology and physiology. ✿