1. Gazi Salahuddin Siddiquee Presented by Lecturer, Agrani School and College

2. Look at the picture and discuss with others Can you tell why smoke out from the car?

3. Discuss about the two picture with your friends Show the differences between the two cities

4. Make similarities between the two pictures

5. Today's Lesson Chapter 12 Excretory system of human body

6. LEARNING OBJECTIVES Candidates should be able to: * Define excretion as the removal of toxic substances * Describe the excretory system of human body * What is urine? * Formation of urine * Importance of excretory system

7. Excretory system of human body

8. How our excretory system works

9. Group Work Think why we need excretory system? Group A Group B Think if we do not have excretory system? Group C Think which animals do not have excretory system?

10. External structure of Kidney

11. Identify the organs (Individual work) A B C D

12. Mind mapping ? ? ? ? ? Functions of Kidney

13. Internal structure of Kidney

14. Structure of the Nephron

15. Mind mapping of Nephrone Nephrone Malpigian Corpasol Malpigian Tubule Bowmans Capsul Glomerulus Proximal tubule Loop of Henle Distal Tubule Collecting duct

16. Filtration by Glomerulas

17. Simulation Excretion Definition of Excretion? Description of the excretory system Definition of Urine? Formation of Urine? Definition of Nephrone? Functions of Kidney