How do your body cells get rid of the excretory materials ?
The excretory materials
The excretory materials are carbon dioxide , nitrogenous wastes , excess salts and excess water , They are the waste materials which produced inside the cells and the body must get rid of them .
Carbon Dioxide
When the body cells burn the digested food ( carbohydrates or starch ) by oxygen to produce the energy, carbon dioxide is produced with the water vapor , And we can get rid of them through the two lungs by the exhalation process .
Nitrogenous wastes
The nitrogenous wastes are produced from breaking down of the proteins which are necessary for the growth of the body and repairing the damaged tissues , They are urea and uric acid , And we can get rid of them through the urinary system .
The excess salts and the excess water
The body gets rid of the excess salts by dissolving them in the excess water . We can get rid of them through the urinary system and the skin .
How do your body cells get rid of the excretory materials ?
When the body cells produce the wastes , they release them to the blood through the thin walls of the blood capillaries .
The blood carries these wastes to the special organs to get rid of them , where carbon dioxide and the water vapour are exhaled from the two lungs .
Nitrogenous wastes ( urea and uric acid ) are removed by the two kidneys ( the urinary system ) .
Your kidneys are composed of 1 million cells called Nephrons , These long coiled tubes are where the blood is actually filtered and the urine is produced .
The excess salts and the excess water are expelled outside the body through the skin in the form of the sweat and the urinary system in the form of urine .
The excretory system is the body system that separates and gives off the waste from the body , usually as the urine or the sweat .
The skin is one of the excretory organs as it gets rid of some excess salts and excess water in the form of the sweat .
The body cells release their wastes into the blood as the blood carries these wastes to special organs to get rid of them .
Important excretory organs in man’s body & Structure of urinary system
Role of the respiratory system in the excretion process in man & Respiration in plant
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