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KIDNEYS

KIDNEYS. KIDNEYS KIDNEYS KIDNEYS KIDNEYS KIDNEYS KIDNEYS KIDNEYS KIDNEYS. KIDNEYS KIDNEYS KIDNEYS KIDNEYS KIDNEYS KIDNEYS KIDNEYS KIDNEYS. FUNCTIONS. Excretion of wastes –

jescie-rodgers
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KIDNEYS

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  1. KIDNEYS

  2. KIDNEYS KIDNEYS KIDNEYS KIDNEYS KIDNEYS KIDNEYS KIDNEYS KIDNEYS KIDNEYS KIDNEYS KIDNEYS KIDNEYS KIDNEYS KIDNEYS KIDNEYS KIDNEYS

  3. FUNCTIONS • Excretion of wastes – • ammonia and urea (breakdown of amino acids), broken down bilirubin (breakdown of hemoglobin), creatinine (breakdown of creatine phosphate in muscles), uric acid (breakdown of nucleic acids) • Regulates blood levels of: • Ions (sodium, potassium, calcium, phosphate, chloride) • pH – excrete H+; conserve bicarbonate ions (a buffer of H+ in blood) • Water – maintains blood volume (bp)

  4. What is urine? • Mostly water • wastes • NOT FOUND: glucose, proteins, rbc, hemoglobin, wbc, and bile

  5. LOCATION • Above waist • Protected by 11th and 12th pair of ribs

  6. Renal capsule: outer covering of kidney Renal cortex: superficial Renal medulla: inner region containing renal pyramids: Apex (papilla) face the hilus Renal column: part of medulla between pyramids ANATOMICAL PARTS

  7. More parts • minor calyx; major calyces – collect urine from pyramid • Renal pelvis – collect urine from calyces • Nephrons – filter urine from blood

  8. URINE FORMATION • Occurs in nephrons: mostly in renal cortex • Leaves through collecting ducts

  9. 1. Glomerular filtration • Water and small solutes from blood • Glomerular capsule • Due to high bp

  10. 2. Tubular reabsorption • Returns useful nutrients to blood • Ex: water, glucose, sodium, calcium • Both passive and active transport • ADH affects cell’s permeability to H20

  11. 3. Tubular secretion • Brings some substances into the urine that are not already there. • Ex: ammonium ions, hydrogen, some drugs

  12. blood supply

  13. kidney blood supply

  14. fetal pig

  15. CAT

  16. 1. What is the difference between the renal cortex and the renal medulla?

  17. 2. What part of the kidney is the hilus?

  18. 3. What part of the kidney collects urine from a medullary pyramid?

  19. 4. What is the function of a nephron?

  20. 5. Which structure of the urinary system leaves the kidneys with urine?

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