1. Next Review Session is: @ :15
Date: June, period 1
Aim # 84: What are the structures and functions of the human excretory system?
HW:
Test Friday 6/2 (Regents MC!)
RRB pages due Friday
Castle Learning (QUIZ #5) due next MONDAY
Do Now:
Next Review Session is: @ :15

2. 1. Major Metabolic Wastes
CO2
Water
Mineral Salts
build up during metabolism
Nitrogen compounds
ammonia, urea, uric acid
breakdown of amino acids

3. 2. Human Excretion Wastes: Organs Involved: CO2 water urea
mineral salts
Organs Involved:
lungs
skin
liver
urinary system

4. 3. Lungs
remove CO2 & water

5. 4. Skin Protection keeps body from drying out removal of excess heat
blood flow through skin’s capillaries
Excretion of sweat
water
salts
urea

6. 5. Liver
removes worn out RBCs & excess amino acids, makes urea

7. 6. Urinary System Kidneys Ureter Bladder Urethra
functional unit = nephron
each Kidney has 1.25 million nephrons!
Ureter
Bladder
Urethra

8. 7. Kidney Function Filters the blood
Removes metabolic wastes and forms Urine
water, salt, urea (nitrogenous waste)
Control water balance
Controls the concentration of various substances in the blood

9. 8. MALFUNCTIONS OF THE EXCRETORY SYSTEM
Dialysis Machine: used to filter blood when kidneys aren’t functioning properly

10. 9. NEPHRITIS nephrons not working inflammation of the kidney
Caused by bacterial infection
treat with antibiotics
can last a long time and cause kidney failure

11. 10. KIDNEY STONES mineral calcium builds up in kidney
Caused by improper diet
treat with surgery or shock waves

12. 11. Gout high levels of uric acid (solid nitrogenous waste) in blood
usually in men
pain in joints, big toe and ankle bone caused by crystals of uric acid
treat with lots of water, special diet and medication

13. 12. LIVER DISEASE too much alcohol
fats accumulate in liver and scars cells cirrhosis
liver shuts down and homeostasis can’t be maintained

14. 13. HEPATITIS B caused by a virus inflammation of the liver
can cause cirrhosis and liver failure
can be fatal

15. Let’s Review: Label the diagram below: Why is excretion important?
Name and describe a disease that can affect your excretory system.