ZOOLOGY
                                         Human Body
The study of the human body involves anatomy and physiology.
The human body is the entire structure of a human being and comprises a head, neck, trunk (which
includes the thorax and abdomen), arms and hands, legs and feet.
                                   Composition of Human Body
   Oxygen = 65%                        Calcium = 1.5%                     Sodium = 0.2%
   Carbon = 18.5%                      Phosphorus = 1.0%                  Chlorine = 0.2%
   Hydrogen = 9.5%                     Potassium = 0.4%                   Magnesium = 0.1%
   Nitrogen = 3.2%                     Sulfur = 0.3%                      Trace elements < 0.1%
                                        Facts of Human Body
             Total number of bones                    206
             Total number of muscles                  640
             Longest organ of human body              Skin
             Longest bone                             Femur - thigh bone
             Smallest bone                            Stapes - stirrup bone
             Largest Endocrine gland                  Thyroid
             Largest muscle                           Gluteus maximus
             Average Weight of an adult brain         1.5 kg
             Blood volume in an adult human           4.7 to 5 litres
             Universal Blood donor                    O Rh (-ve)
             Universal Blood recipient                AB Rh (+)
             Dental formula of Adult                  2123/2123 = 32
             Dental formula of Child                  2120/2120 = 20 milk teeth
             Menopause age                            40 to 50 years
             Average height of an adult male          5"7" to 5"11"
             Average height of an adult female        5"2" to 5"7"
             Normal body temperature                  37° Celsius or 98° Fahrenheit
             Normal blood pressure (BP)               120/80 mmHg
             Normal human heart rate                  60 to 100 bpm
             Normal pulse rate                        72 per minute
             Minimum distance of proper vision        25 cm
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