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Black flies are blood-sucking insects who vector disease, like River Blindness, while feeding on hum
Illustration of an embolus floating in an artery. The embolus will become lodged in a blood vessel t
Cardiac catheterization. Insertion of a tube called a catheter through a blood vessel. In this examp
Sphygmomanometry. Photograph of a physician taking blood pressure readings with the use of a sphygmo
Blood Vessels
Clostridium difficile: (a) on blood agar and (b) scanning electron microscopy.