The human body consists of Many systems one of them is 

 circulatory system

  its functions  transports food , oxygen and water  to all body cells.

 Transports wastes as CO2 from cell  to special organ to get rid of it .

The heart  size about your fist in chest cavity between 2 lungs pump blood to all body cell .

 urinary system 

in  the abdominal  cavity near back bone  .uric acid excess salt excess water in from urine .

urinary bladder  function rescue urine from ureters sture urine temporary get  rid of urethra shape balloon likes .shape narrow tube  function carry urine from  kidney to urinary bladder .     How to keep the human body healthy                                                                                  .       

       1-  eat fruit and vegetables .

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       2- Don’t smoke  harm  heart muscle weak  blood circulate                               

       3- Eat healthy food low salt low fat .                                                                       

      4- drink a suit able amount  of water 

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       5-Eat balanced  food  low salt .                                                                                    

       6-don’t urinate in irrigated canal.     

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