1) Where are the lungs located in the body? a) the abdomen b) the thorax 2) What is the name of the breathing system that contains the lungs? a) Circulatory b) Digestive c) Respiratory d) Nervous e) Reproductive 3) Where does GAS EXCHANGE [O2 and CO2] take place? a) Mouth b) Nose c) Trachea [windpipe] d) Bronchi e) Bronchioles f) Alveoli [air sacs] 4) Which is NOT a way that alveoli are adapted to their job of gas exchange? a) thin walled b) moist c) thick walled d) lots of blood capillaries e) large surface area 5) Where does respiration take place? a) Only in the lungs b) In ALL cells

Breathing & Respiration KS3

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