The excretory system consists of four main organs that remove waste from the body: the skin, kidneys, ureters, and bladder. The kidneys contain millions of nephrons that filter waste from the blood and produce urine. The ureters carry urine from the kidneys to the bladder, where it is stored until release through the urethra. Together, these organs maintain homeostasis by excreting wastes and regulating fluid levels in the body.

1. presented by: Latif Mirani
Class: BS English 1st Semester
presented to: Dr.Waqas Ahmad

2. What is Excretory System?
Excretory System.

3. Excretory System

4. Four Organs of the Excretory System

6. Four Organs of the Excretory System
The Skin, that rids the body of wastes
through sweat glands.

7. Kidneys & Urinary System
Urinary System – excretes waste and maintains homeostasis of
body fluids.
Kidneys (main organ of the system)
Ureters
Bladder
Urethra

8. Kidneys- Functional Units & Product
Kidneys
Two
Fist sized
Bean shaped

9. Kidneys- Functional Units & Product
Nephron (about one million per kidney)
Microscopic functional units of kidneys, that filter blood of
wastes.
H2O and waste taken from blood into nephron
Form URINE
 Urine
 Pale yellow solution
 Urea, H20, salts, other trace solutions (toxins…)

10. Ureters
Urine leaves the kidney through a duct called
ureter.
Narrow muscular tubes
Connect kidney to Bladder

11. Urinary Bladder
Ureters of both the kidney opens into muscular sac
called Urinary Bladder.
Store urine.
Expand to fill.

12. Urethra
The urethra empties near vagina in females and
penis in males.

13. Continue….
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 Presented by:
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