1409 BIOLOGY FiB04 Urinary System.doc

1409 BIOLOGY FiB04 Urinary System.doc - 1 04 Urinary System...

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1 04 Urinary System Homeostasis - the art of staying the SAME ; maintaining stable conditions on the inside no matter what your body is doing. Kidney - organ that filters blood to get rid of WASTE products and makes urine. Functions of the urinary system: 1. Regulation of ions. LIKE SODIUM Na+, POTASSIUM K+, CHLORIDE Cl-, CALCIUM Ca+2, HYDROGEN H+, ETC. 2. Regulation of water VOLUME in bloodstream. 3. Maintains PROPER pH. 4. Elimination of cellular WASTE products. 5. Retains NUTRIENTS . 6. Secretion of HORMONES . Urea - made from breaking down proteins; secreted in URINE. Dilute urine - urea dissolved in LOTS of water. Concentrated urine - urea dissolved in very LITTLE water. Protonephridia - a single CELL through which wastes leave; flatworms. Nephridia - small tube that releases waste products to the outside; EARTHWORMS . Renal artery - carries blood from the heart to the KIDNEY to be filtered. Renal vein - carries blood from the kidney back to the HEART .
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  • Spring '16
  • Christina Snaples
  • Biology

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