kidney\

• what does the urinary system do?

  maintains water balance, removes waste products
• what do the renal veins do?

  carry cleaned blood back to the body
• what do the ureters do?

  carry urine from the kidney to the bladder
• where is urine stored?

  in the bladder
• what do the urethras do?

  carry urine to the outside of the body
• what do the renal arteries do?

  carry blood from the body to the kidneys
• what do the kidneys do?

  remove substances including urea from the blood and make urine
• urea is produced from the breakdown of excess amino acids in the liver
• what do nephrons (in the kidney) do?

  make urine
• glomerulus: small knot of capillaries
• selective reabsorption: useful molecules are absorbed back into the blood
• what does ADH do?

  regulates water content of the blood
• ADH increases the permeability of the cell membrane in the collecting duct of the nephron so that more water is reabsorbed from the urine by osmosis
• where is ADH secreted from?

  the pituitary galnd
• alcohol inhibits ADH production
• ADH increases permeability of the cell membranes in the collecting duct so more water in reabsorbed