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Key People:Carl F.W. LudwigWilliam Prout...(Show more)Related Topics:ExcretionUrineurethraKidneyRenal artery...(Show more)

Renal system, in humans, organ system that consists of the kidneys, wherein urine is produced, and also the ureters, bladder, and urethra because that the passage, storage, and also voiding that urine.

In countless respects the human being excretory, or urinary, device resembles those of various other mammalian species, however it has actually its own distinctive structural and also functional characteristics. The state excretory and urinary emphasize the elimination function of the system. The kidneys, however, both secrete and actively retain within the body certain substances that are as crucial to survival as those that are eliminated.

The system consists of two kidneys, which control the electrolyte composition of the blood and also eliminate liquified waste products and also excess amounts of various other substances from the blood; the last substances room excreted in the urine, which passes from the kidneys to the bladder by method of two thin muscular tubes called the ureters. The bladder is a sac that holds the urine till it is eliminated through the urethra.

Human excretory organs

The kidneys

General description and also location

The kidneys space bean-shaped, red brown paired organs, concave top top one lengthy side and also convex on the opposite. Lock are generally located high in the abdominal cavity and against its ago wall, lied on either next of the vertebral column between the level of the 12th thoracic and 3rd lumbar vertebrae, and also outside the peritoneum, the membrane the lines the abdomen.


female kidney in situ; human renal system
Female kidney in situ.
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The long axes of the kidneys room aligned through that of the body, but the upper finish of each kidney (pole) is tilted contempt inward towards the backbone (vertebral column). Located in the center of the medial concave border is a deep vertical cleft, the hilus, which leader to a cavity within the kidney recognized as the renal (kidney) sinus. The hilus is the allude of entry and exit the the renal arteries and veins, lymphatic vessels, nerves, and also the enlarged upper extension of the ureters.