1. Which cells of the blood carry oxygen to different parts of the body?   Red blood cells   True   Larynx   C   Hint Half-n-half Clue   2. True or False: Breathing through the mouth is considered as good as breathing through the nose.   True   False   3. What is the leaf-like structure which prevents the entry of food into respiratory passages?   Epiglottis   Pharynx   Larynx   Tongue   Half-n-half Clue   4. Exchange of air occurs in _______ which are also known as 'air sacs'.   Alveoli   Bronchi   Bronchioles   Alveolar ducts   Half-n-half Clue   5. 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   Half-n-half Clue   6. True or False: Trachea contains 16-20 'C'-shaped cartilaginous rings.   True   False   7. Identify diaphragm in this diagram.   B   C   D   E   Half-n-half Clue