RECTUM:
The distal portion of the large intestine, between the sigmoid colon and the anal canal. Functions as a storage cavity to collect fecal material prior to defecation.
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RECTUS ABDOMINUS MUSCLE:
Muscle which contributes to flexion of the lumbar vertebrae and provides abdominal support. It originates at the pubis and inserts into the xiphoid process and the cartilage of the fifth, sixth, and seventh ribs.
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RECTUS FEMORIS MUSCLE:
Muscle which contributes to the extension of the leg and flexion of the thigh. It originates at the anterior inferior iliac spine and the rim of the acetabellum, and inserts into the patella and tubercle of tibia.
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RENAL ARTERY:
Artery which originates from the abdominal aorta and provided branches for the ureters and the inferior adrenal (suprarenal) artery.
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RENAL CORTEX:
The outer portion of the kidney, containing most of the glomeruli.
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RENAL HILUS:
The inner medullary portion of the kidney, containing the urine collecting tubules.
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RETROGASTRIC AREA:
The area behind the stomach.
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RIGHT ATRIUM:
Chamber on the right side of the heart that recieves blood from the superior and inferior vena cavi, directing it to the right ventricle.
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RIGHT COLIC ARTERY:
Artery which originates from the superior mesenteric artery and supplies the ascending colon.
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RIGHT COMMON CAROTID ARTERY:
The artery which begins at the bifurcation of the brachiocephalic trunk and splits into the internal and external carotid arteries.
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RIGHT GASTROEPIPLOIC ARTERY:
Artery originating from the gastroduodenal artery and branching into the gastric and omental (epiploic) arteries.
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RIGHT MAINSTEM BRONCHI:
Derived from the trachea, the right main bronchus that enters the right lung.
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RIGHT MARGINAL ARTERY:
Artery which originates from the right coronary artery, passing along the inferior of the heart and apex, suppling the right ventricle.
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RIGHT PULMONARY ARTERY:
Artery which originates from the pulmonary trunk and branches into the arteries of the superior, medial and inferior lobes of the lung.
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RIGHT VENTRICLE:
Chamber of the heart that directs the blood to the pulmonary trunk and into the lungs.
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ROOF OF ACETABULUM:
The superior portion of the acetabulum.
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ROOF OF ORBIT:
The superior wall formed by the "orbital process" of the frontal bone and lesser wing of the sphenoid bone.
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ROOT OF PENIS:
The proximal, attached, portion of the penis.
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Bug Report
Portions © 1997 J.G. Smirniotopoulos, M.D. and others.