1) Respiratory system is responsible for..........process a) digestion b) excretion c) breathing 2) Respiratory system supplies the body with ............. gas through respiration a) oxygen b) carbon dioxide c) _nitrogen 3) Respiratory system gets rid of .............. gas through respiration a) oxygen b) carbon dioxide c) _nitrogen 4) ........................ is the process of pulling air in and pushing air out of the body a) digestion b) excretion c) respiration 5) ............ is considered a waste product and harmful to our body so we must expel it out during exhalation a) oxygen b) carbon dioxide c) nitrogen 6) All of the following are organs of the respiratory system except............... a) nose b) mouth c) lungs d) diaphragm 7) During inhalation, air enters through................. then down the throat a) nose and trachea b) nose and mouth c) mouth and lugs d) mouth and trachea 8) ........ is the first organ from which the air enters the body a) Pharynx b) Trachea c) Nose d) Lung 9) ........... allows the air to pass from nose to the trachea a) Nose b) Throat c) Trachea d) Diaphragm 10) ...... is a tube that allows air to pass into the two lungs a) Nose b) Throat c) Trachea d) Diaphragm 11) .......... are tubes that look like the branches of a tree a) lungs b) alveoli c) bronchi d) bronchioles 12) The bronchioles end with little air sacs surrounded by blood vessels known as ......... a) lungs b) alveoli c) bronchi d) bronchioles 13) .............. is a large muscle at the base of ribs plays an important role in inhalation and exhalation a) Nose b) Throat c) Trachea d) Diaphragm 14) The throat is connected to the lungs through ................ a) esophagus b) trachea c) small intestine d) ribs 15) Inside the two lungs,at the end of smaller air passages (bronchioles) there are tiny air sacs surrounded by ................... a) air b) water c) small intestine d) blood vessels 16) Inside the lungs, the trachea is branched into two tubes known as .......... a) alveoli b) air sacs c) bronchi d) blood vessels 17) The oxygen gas moves from air into blood at the ...................... a) nose b) throat c) trachea d) lungs 18) During inhalation , the diaphragm.............. a) Contracts b) expands c) relxes d) moves upward 19) During exhalation , the diaphragm............ a) Contracts b) relxes c) shrinks d) moves downward 20) During inhalation , the size of chest ........... a) decreases b) increases c) becomes narrow 21) During exhalation , the size of chest ......... a) increases b) decreases c) enlarges 22) During inhalation , the air rich in ........... gas enters the lungs a) oxygen b) carbon dioxide c) nitrogen 23) During exhalation , the air rich in ........... gas is expelled out of the lungs a) oxygen b) carbon dioxide c) nitrogen 24) All organs of the human respiratory system are considered as ................ adaptation a) only structural b) only behavioral c) structural and behavioral d) neither structural nor behavioral) 25) .......... is an organ of the human respiratory system which fill up with air like a balloon a) Diaphragm b) Throat c) Trachea d) Lung

Respiratory system

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