1. Controlling the Internal Environment
THE EXCRETORY SYSTEM
Controlling the Internal Environment

2. Gross Anatomy of System
Pair of kidneys
Retroperitoneal
Pair of ureters
Urinary bladder
Urethra

3. Gross Anatomy

4. Location of Kidneys Retroperitoneal

5. Retroperitoneal Location

6. The Kidney Papilla Pyramid Cortex Medulla Hilum Column Calyx Pelvis
Ureter

7. Functions of Excretory System
Regulate body fluids
Volume, pH, composition
Remove metabolic wastes from blood
Control rate of RBC formation
Regulate blood pressure
Regulate absorption of calcium

8. Nephron PCT Bowman’s DCT capsule Vasa recti Glomerulus Ascending
tubule
Descending
Tubule
Collecting duct

9. The Blood Supply to the Kidney

10. Renal Corpuscle

11. Renal Corpuscle

12. Podocyte and the Filtration Process

13. Renal Corpuscle

14. Function of Renal Corpuscle
Bowman’s capsule
Glomerulus
Filtration of blood
Water
Electrolytes
Glucose
Urea

15. Filtration Slits

16. Nephron

17. Tubules
Proximal Tubule
Distal Tubule

18. Function of Tubules Reabsorption of glucose Reabsorption of water
Proximal convoluted tubule
Reabsorption of water
PCT, descending tubule, collecting duct
Reabsorption of salts
PCT, ascending tubule, distal con. tub.
Reabsorption of urea
PCT, collecting duct

19. Collecting Ducts
Cuboidal Epithelium lining ducts

20. Nepron with Vasa Recta

21. Function of Tubules Reabsorption of glucose Reabsorption of water
Proximal convoluted tubule
Reabsorption of water
PCT, descending tubule, collecting duct
Reabsorption of salts
PCT, ascending tubule, distal con. tub.
Reabsorption of urea
PCT, collecting duct