Author: Glossary
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Ureteric orifice
The opening of the ureter into the bladder.
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Mitral orifice
The opening between the left atrium and the left ventricle.
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Internal urethral orifice
The opening from which the urethra makes its exit from the bladder.
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External urethral orifice
The exterior opening of the urethra. In the male, it is located at the tip of the glans penis; in the female, it is located anterior and cephalad to the vaginal opening.
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Atrioventricular orifice
The opening between the atrium and the ventricle on each side of the heart.
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Orientia tsutsugamushi
An intracellular parasite, formerly known as Rickettsia tsutsugamushi, that is the causative agent of scrub typhus. It is transmitted to humans by the bites of infected trombiculid mites, which prey in the wild on rodents.
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Organ system
A group of structures or organs related to each other and performing certain functions together (e.g., the digestive system).
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Organ-specific
Originating in a single organ or affecting only one specific organ.
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Organ recovery
The surgical removal of a body part from one person to be used in organ transplantation in another patient.
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Organ procurement organization
An institution that facilitates organ transplantation by obtaining cadaveric tissues and organs for use in living patients with end-stage diseases of the heart, kidneys, liver, and lungs.