1. True or False: Trachea contains 16-20 'C'-shaped cartilaginous rings.   True   False   2. True or False: Breathing through the mouth is considered as good as breathing through the nose.   True   False   3. Write the correct sequence of the pathway through which air travels after entering the body. A. Larynx, pharynx, trachea bronchioles B. Pharynx, larynx, trachea, bronchioles C. Pharynx, larynx, bronchioles, trachea D. Pharynx, trachea, larynx, bronchioles   A   B   C   D   Hint Half-n-half Clue   4. Complete the equation: Glucose + Oxygen = _______ + Water + CO2   Starch   None of these   Sucrose   Energy   Half-n-half Clue   5. What is the leaf-like structure which prevents the entry of food into respiratory passages?   Tongue   Larynx   Epiglottis   Pharynx   Half-n-half Clue   6. Which part of the respiratory tract is also known as the voice box?   Larynx   Epiglottis   Trachea   Pharynx   Half-n-half Clue   7. Which cells of the blood carry oxygen to different parts of the body?   Larynx   B   Red blood cells   Energy   Half-n-half Clue