renal portal system
blood vessels (veins) carrying blood from the posterior part of the body to the kidneys. Oxygenated blood is carried to the kidneys by the renal arteries ...
portal system System of large veins beginning and ending with a bed of capillaries; for example, hepatic portal and renal portal system in vertebrates.
 See also: Oxygen, Posterior, Renal, Veins, Oxygenated blood
  
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