1) When we breathe in air passes through which part first a) trachea b) Nasal cavity c) Bronchioles 2) The alveoli are used in the process of... a) oxygen transportation b) blood transportation c) Gaseous exchange 3) What is the muscle at the bottom of the thoracic cavity? a) Intercoastal muscle b) Diaphragm c) Deltoid 4) What do the Bronchi divide into? a) Bronchioles b) Trachea c) Alveoli 5) What organs do the ribs protect? a) kidney & Heart b) Heart & lungs c) Lungs & stomach 6) What are the rings made of that keep the trachea from closing? a) Bone b) muscle c) Cartilage 7) What gas do we breathe in? a) Nitorgen b) Oxygen c) Carbon dioxide 8) What gas do we breathe out? a) Carbon dioxide b) Oxygen c) Nitrogen

Respiratory system Structure & Function

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