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CELLULAR RESPIRATION

                     The oxygen absorbed by the blood binds with haemoglobin, a protein present in
                       the blood, and forms oxyhaemoglobin.
                     It is transported in this form to different parts of the body.
                     It is released in the cells where it is used for cellular respiration.
               Cellular  respiration:  It  is  the  process  in  which  oxygen  reacts  with  glucose  to  form
               carbon dioxide and water. Energy is released in this process.  Carbon dioxide formed
               during respiration is carried by blood to the lungs, from where, it is expelled out of the
               body during exhalation.

               TYPES OF RESPIRATION


                 Oxygen is required for respiration  in most of the organisms, but some organisms,
                   such as, yeast and some bacteria, do not use oxygen for respiration.
                 Thus, respiration is of two types- Aerobic respiration and Anaerobic respiration.





















               1.  Aerobic respiration:
                      Aerobic respiration takes place in the presence of oxygen.
                      In  this  process,  sugar  formed  after  digestion  combines  with  inhaled  oxygen.
                        Sugar then breaks down into carbon dioxide and water and releases energy.
                      Carbon dioxide and water are the end products of aerobic respiration. Aerobic
                        respiration happens in most of the organisms. Ex-All plants and animals.

                    Glucose (Presence of oxygen) → Carbon dioxide + Water + Energy


               2.  Anaerobic respiration:
                      Anaerobic respiration takes place in the absence of oxygen.





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