Answers:
First and foremost, conventional relatives breathe to bring back rid of CO2 (carbon dioxide). CO2 is toxic to the body and we stipulation to save our level low.
Secondly we breath to oxygenate the body. Oxygen is appropriate for the body and we entail to hold on to oxygen flowing to the cell of the body.
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To stay alive.. Are you serious??
The cell of our bodies want oxygen to craft ample vitality to survive. One of the gamble away byproducts is Carbon Dioxide. Breathing allows for an exchange of both of these gasses by process of the lungs.
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To expand beyond what the other responder said, we do breath since our cell inevitability oxygen for force and they produce carbon dioxide for leftovers. More specifically, the oxygen is used for aerobic respiration.
Your body have two methods of liveliness anaerobic respiration and aerobic respiration. For small low punch tasks resembling minor movements your body may use anaerobic respiration which involves converting glucose (blood sugar) into pyruvate and next to lactate. This method is greatly inefficient, especially when a larger or prolonged assignment is required.
Aerobic respiration is moderately complicated and involves numerous chemical reaction call the electron transport manacle and is much more restructured. During these reaction glucose is broken down into other molecules and several molecules of carbon dioxide are released.
To bring in a long story short oxygen is the proverbial wastebasket for the numerous electrons that are used surrounded by the electron transport to engender animation from glucose. These molecules of oxygen are after bonded to hydrodgen atoms to form hose. This river is after any breathed out as sea vapor or used within another of the body's reaction. The carbon dioxide that be released sooner is breathed out as ably.
I tried to furnish you a more within depth explanation lacking it man to confusing. I hope this help.