71. At the time of inspiration the diaphragm
72. Rate of breathing in a minute by man is
73. The C shape of the tracheal cartilage is important because
74. Alveoli is related to which of the following system of human body?
75. Complete oxidation of sucrose in presence of oxygen into CO2, water and energy is called
76. When the diaphragm and external intercostal muscles contract,
77. Blood leaving lungs, is rich in
78. The organs protected by the thoracic cage include the
79. By complete oxidation of glucose number of ATP molecule formed is
80. If CO2 concentration in the blood increases, the breathing will
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