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Black flies are blood-sucking insects who vector disease, like River Blindness, while feeding on hum
Sickled and normal red blood cells
Medicinal leeches on a patient’s neck. Today leeches are sometimes used in microsurgery to prevent b
Major Events in the History of Psychology
Iron-deficient red blood cells.
The blood cells are shown in (a)–(f) and the tissue white blood cells are shown in (g), (h), and ...