gas exchange

Question 1

3 requirements for gas exchange surface

Answer 1

moist thin large SA

Question 2

diffusion

Answer 2

movement of molecules from area of higher concentration-> area of lower

Question 3

human gas exchange system

Answer 3

nasal cavity (filter/moisten warm air), oral cavity (warm/moisten air, same as nasal), pharynx (connects oral/nasal to larynx), epiglottis (closes airway when swallow food, no entering trachea), larynx (produces sound by vibration), trachea (passage air to bronchi), bronchus (passage air to bronchioles), bronchioles (passage air to alveoli (gas exchange), diaphragm (increase/decrease vol of chest cavity when breathing)