Renal pyramid
renal pyramid n.
Any of various pyramidal masses that are seen upon longitudinal section of the kidney and that contain part of the secreting tubules and the collecting tubules. Also called malpighian pyramid, medullary pyramid.
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renal sinus n. The cavity of the kidney, containing the calices and the pelvis.
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renal tubule n. A tubule of the kidney, such as a collecting or convoluted tubule.
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renal vein n. Any of the veins that accompany the renal arteries and open at right angles into the vena cava at the level of the second lumbar vertebra.