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EXCRETORY SYSTEM

EXCRETORY SYSTEM. The job of the excretory system is to remove various wastes produced by the body. The removal process is known as excretion. The wastes produced by the body : - Carbon dioxide - Water - Nitrogenous wastes - Mineral Salts: (NaCl , KSO 4 ).

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EXCRETORY SYSTEM

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  1. EXCRETORY SYSTEM

  2. The job of the excretory system is to remove various wastes produced by the body. The removal process is known as excretion.

  3. The wastes produced by the body : - Carbon dioxide - Water - Nitrogenous wastes - Mineral Salts: (NaCl , KSO4)

  4. Ammonia Uric Acid Urea

  5. Functions of Excretion • To Regulate the chemical makeup of the blood and body fluids by removing wastes and excess materials. • To maintain a constant body temperature by removing excess heat.

  6. 3. To maintain the homeostasis (internal balance) together with the circulatory, nervous and endocrine system

  7. Human Urinary System The urinary system includes the - Kidneys, - Ureter, - Urinary bladder, - Urethra.

  8. Functions of Kidneys • They remove the wastes of cellular metabolism from the blood. • They control the concentrations of the various substances found in the body fluids.

  9. The kidneys filter metabolic wastes and various other substances from the blood, producing urine.

  10. Two tubes, the ureters, carry the urine to the urinary bladder, where it is stored temporarily.

  11. Another tube, the urethra, carries the urine from the bladder to the outside of the body.

  12. Structure of Kidney The kidney is divided into three distinct regions. • The outermost region is the cortex, • the middle region is the medulla, and • the inner region is the pelvis.

  13. The filtering of the blood occurs in the cortex; The medullaconsists of collecting ducts that carry the urine; and The pelvis is a cavity connected to the ureter, into which the urine drains

  14. Structure of Nephron • The functional units of the kidneys are the nephrons. • A cluster of Blood capillaries, theglomerulus, • It is surrounded by Bowman's capsule.

  15. Four functions of the kidney

  16. proximal convoluted tubule- loop of Henle- distal convoluted tubule- collecting duct

  17. A Nephron

  18. Blood enters the kidneys through therenal arteries.It leaves the kidneys through therenal veins.

  19. MEIOSIS

  20. QUIZ

  21. What is the job of excretory system?

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