Topic: Excretory SystemAim: Cite specific textual evidence to

describe parts & functions of the Excretory System.

Do Now: Take out your homework. And the respiratory system ditto from yesterday.

HW: Study for Monday’s Digestive and Circulatory System Test!

Trachea

Nose

Nasal cavityPharynx

Epiglottis Larynx

BronchusBronchioles

Diaphragm

11.

14.

15.

Bronchioles

AlveoliCapillary

Alveolus

12.

Did you know…•An average person sheds from about 30000 to 40000 skin cells every minute.

Did you know…•A liver would be about 3 pounds in an average human and it is rubbery to touch.

Did you know…•About 440 gallons of blood flow through the kidneys each and every day!

Did you know…•The average person pees about 3000 times a year.

Did you know…•The average person passes 9,202 gallons of urine in his/her lifetime. That’s enough to fill 315 bathtubs.

Did you know…•If you eat a lot of red beets, your urine will actually be colored red.

• Regulate the amount of water you have in your body

• Help remove wastes from the body

1. Describe the functions of the excretory system.

• METABOLIC wastes – CO2– Water– Urea– Salts

2. Identify the wastes your excretory system removes.

• Sweat glands releases PERSPIRATION

3. Describe why the skin is considered an excretory organ.

• Water, salts and urea4. Identify the metabolic wastes found in perspiration.

• Sweat glands release water on to your skin to prevent you from getting overheated.

5. How does the skin regulate your body temperature?

• The liver filters nitrogen out of your blood, changing it into UREA.

6. Describe why the liver is an excretory organ.

• DETOXIFIES the blood (removes toxins such as drugs and alcohol)

• UREA7. Identify the metabolic waste produced by the liver.

• Filter out urea from your blood

8. Explain the main function of the kidneys,

• Regulate the amount of water in your blood.

9. Describe another function of the kidneys.

• URINE10. Identify the liquid produced by the kidneys.

• Water

• Salt

• Urea

11. Identify the metabolic wastes found in urine.

• Urinary bladderhttp://www.youtube.com/watch?v=uAy5C2YYlbk

12. Identify the muscular bag that stores urine.

• Ureters13. Identify the tubes that transport urine from the kidneys to the urinary bladder.

• Urethra14. Identify the structure that transports urine out of the body.

• Lungs: release CO2 and H2O vapor

CO2 & H20 vapor

Did you know…•About 440 gallons of blood flow

through the kidneys each and every day!

•If you eat a lot of red beets, your urine will actually be colored red.

•The average person passes 9,202 gallons of urine in his/her lifetime. That’s enough to fill 315 bathtubs.

Let’s summarize…

1. Explain the function of the excretory system.

2. Explain the difference between excretion and egestion.

3. Describe the major organs of the excretory system and their functions.

1.Identify A, B, and D.

2.Which organ produces urea?

3.What is the function of D?

4.What does organ A excrete?

5.Which organ detoxifies the blood?

1.Identify structures A, B, C, and D.

2.Which structure produces urine?

3.What is the path of urine?

4.What are the 2 main functions of A?

5.What stores urine?

6.What is the function of D?

7.Where would kidney stones form?

1.Which letter in the diagram below indicates the organ that is involved in the production of urea?

2.Which organ filters urea from the blood?

1. Which letter indicates a structure responsible for filtering urea out of the bloodstream? 2. Which organ contains nephrons?3. What is the function of D?