B. Solve the crossword puzzle with M ACROSS 1. Taking in oxygen and producing energy and removing the waste products. (11) 2. Product of anaerobIC respiration. (10) R P L C 3 Small air sacs at the other end of bronchioles. (7) A A E O 4. Air enters our body from here. (8) G 5. ts expansion/contraction controls the opening and closing of stoma. (10) N T DOWN 6. Site of anaerobic respiration in animals and humans. (7) G 7. Respiratory organ of fish. (5) 8. The opening through which woody stems take in air. (9) c R​