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EXCRETORY SYSTEM

PP 993-998. EXCRETORY SYSTEM. FUNCTION. Every cell in the body produces metabolic waste. The skin, lungs, and kidneys make up this system. SKIN (Integumentary System). Excretes water, salts, small amounts of nitrogenous wastes. Lungs. Excrete water vapor and CO2. URINARY SYSTEM.

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EXCRETORY SYSTEM

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  1. PP 993-998 EXCRETORY SYSTEM

  2. FUNCTION • Every cell in the body produces metabolic waste. • The skin, lungs, and kidneys make up this system.

  3. SKIN (Integumentary System) • Excretes water, salts, small amounts of nitrogenous wastes

  4. Lungs • Excrete water vapor and CO2

  5. URINARY SYSTEM • Formation and excretion of urine • Mostly water to keep wastes dissolved and easier to excrete (nitrogenous waste).

  6. URINARY SYSTEM • Formation and excretion of urine

  7. URINARY SYSTEM • Formation and excretion of urine • Mostly water to keep wastes dissolved and easier to excrete (nitrogenous waste).

  8. Step 1: FILTRATION • blood forced into kidneys to clean out urea (created in liver), toxins, mineral salts, and water to from urine.

  9. Step 2: REABSORPTION • Some substances return to blood to maintain balance (through vena cava/vein)

  10. Step 3: ELIMINATION • Urine passes through the ureters to be stored in bladder until it is secreted through the urethra

  11. URINE • Normally made of urea, water, salt and has a very light yellow color

  12. WHAT URINE TELLS US • Proteins may leak into the urine if the kidney is damaged

  13. WHAT URINE TELLS US • Proteins may leak into the urine if the kidney is damaged • Too dark in color indicates dehydration

  14. WHAT URINE TELLS US • Proteins may leak into the urine if the kidney is damaged • Too dark in color indicates dehydration • Brown color indicates bleeding from the kidneys

  15. WHAT URINE TELLS US • Proteins may leak into the urine if the kidney is damaged • Too dark in color indicates dehydration • Brown color indicates bleeding from the kidneys • Urine will have a high glucose count if the individual is diabetic

  16. WHAT URINE TELLS US • Proteins may leak into the urine if the kidney is damaged • Too dark in color indicates dehydration • Brown color indicates bleeding from the kidneys • Urine will have a high glucose count if the individual is diabetic • Low or no glucose indicates hypoglycemia, which results from too much insulin

  17. Assignments • Class Work: Dig/Exc Review WS • HW: SG # 11-20 and Urinalysis Pre Lab MUST BE DONE IN ORDER TO DO LAB!!

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