Human Excretory
urinary System
The kidney- grade 11
Structure of the urinary excretory
system
This system includes 4 main organs:

Kidneys

Bladder

Excretory
system

Urethra

ureters
Main function of the urinary System
 The

human excretory system functions to
remove waste from the human body.

 During...
The internal & external structures of a
kidney
The flow of urine inside the kidney

Glomerulus

Renal
tubules

Renal
pelvis

Ureter

Renal
calices
Purpose of a kidney
 Filters

blood, redirecting wastes as urine
through the ureter and to the urinary
bladder and out of...
Structure of a nephron
What is a nephron?

A functional
unit of a
kidney.

Blood enters
the nephron at
the Bowman’s
capsule and is
filtered by th...
Blood Flow through the Kidneys

Blood enters
via renal
artery

Arterioles

Nephron

Renal
corpuscle
The 3 processes of blood purification
inside the kidneys.
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.

Bowman's
capsule
Glomerulus
...
The remaining urine goes to the collecting
duct and into the ureters, the bladder and
out of the body via the urethra.
Normal & abnormal flow of urine
References
The slides above have been re-purposed from the following
presentation links from slideshare:
http://www.slides...
201125991
Ledwaba .M
Human urinary excretory system
Human urinary excretory system
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Human urinary excretory system

  1. 1. Human Excretory urinary System The kidney- grade 11
  2. 2. Structure of the urinary excretory system
  3. 3. This system includes 4 main organs: Kidneys Bladder Excretory system Urethra ureters
  4. 4. Main function of the urinary System  The human excretory system functions to remove waste from the human body.  During urination animals get rid of nitrogenous waste products of metabolism, including ammonia, urea, and uric acid.
  5. 5. The internal & external structures of a kidney
  6. 6. The flow of urine inside the kidney Glomerulus Renal tubules Renal pelvis Ureter Renal calices
  7. 7. Purpose of a kidney  Filters blood, redirecting wastes as urine through the ureter and to the urinary bladder and out of the body via urethra.  Each kidney consists of millions of nephrons – the fundamental units of the kidney
  8. 8. Structure of a nephron
  9. 9. What is a nephron? A functional unit of a kidney. Blood enters the nephron at the Bowman’s capsule and is filtered by the glomerulus, a ball of capillaries. Bowman’s capsule collects filtrate, plasma forced out of the blood. Filtrate passes through the entire nephron becoming modified into urine.
  10. 10. Blood Flow through the Kidneys Blood enters via renal artery Arterioles Nephron Renal corpuscle
  11. 11. The 3 processes of blood purification inside the kidneys.
  12. 12. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Bowman's capsule Glomerulus Filtration Reabsorption to blood Secretion from blood Renal tubule Excretion
  13. 13. The remaining urine goes to the collecting duct and into the ureters, the bladder and out of the body via the urethra.
  14. 14. Normal & abnormal flow of urine
  15. 15. References The slides above have been re-purposed from the following presentation links from slideshare: http://www.slideshare.net/itutor/excretory-system23183659?qid=6d3c0d3b-e56c-4c57-83c098fbae82b3eb&v=qf1&b=&from_search=1 http://www.slideshare.net/jgthatsme/excretorysystem?qid=9ee1584a-3dda-4d5a-b11be75b5400133f&v=qf1&b=&from_search=1 http://www.slideshare.net/132cool/excretory-system8430788?qid=81f3882c-84d0-46f6-867b782728c2fc79&v=default&b=&from_search=12
  16. 16. 201125991 Ledwaba .M

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