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38.3 The Excretory System ,[object Object]
Kidney ,[object Object],Organ that removes urea, excess water, and other waste products from blood.,[object Object]
Ureter ,[object Object],Tube that carries urine from the kidney to the urinary bladder.,[object Object]
Urinary Bladder ,[object Object],Saclike organ in which urine is stored before being excreted.,[object Object]
Nephron,[object Object],Blood-filtering unit in the renal cortex of the kidney.,[object Object]
Filtration,[object Object],Process by which a liquid or gas passes through a filter to remove wastes.,[object Object]
Glomerulus,[object Object],Small network of capillaries encased in the upper end of a nephron; where the filtration of blood takes place.,[object Object]
Bowman’s Capsule,[object Object],Cup-shaped structure in the upper end of a nephron that encases the glomerulus.,[object Object]
Reabsorption,[object Object],Process in which liquid is taken back into a vessel.,[object Object]
Loop of Henle,[object Object],Section of the nephron tubule that conserves water and minimizes the volume of urine.,[object Object]
Urethra,[object Object],Tube that carries urine from the bladder and releases it from the body; in males, through which semen is released from the body.,[object Object]
Key Concept,[object Object],The kidneys play an important role in maintaining homeostasis. They remove waste products from the blood; maintain blood pH; and regulate the water content of the blood and, therefore, blood volume.,[object Object]
Key Concept,[object Object],As blood enters a nephron through the arteriole, impurities are filtered out and emptied into the collecting duct. The purified blood exits the nephron through the venule.,[object Object]

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Biology 38.3

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