The deoxygenated blood is reaches……..
a) lungs
b) kidney
c) whole body cells
d) liver
Which of the following gas is diffuses from blood capillaries into the alveoli air?
a) oxygen
b) nitrogen
c) carbon dioxide
d) hydrogen
Which of the following gas is breath out of the body?
a) oxygen
b) methane
c) carbon dioxide
d) hydrogen
Why alveoli are perfect respiratory surface? It is because they are…….
a) thin walled
b) have large surface area
c) are moist
d) all of these
Why alveoli are perfect respiratory surface? It is because they are…….
a) are surrounded by blood capillaries
b) have large surface area
c) have a supply of fresh air
d) all of these
If all the alveoli of your lungs are flattened and put together, their surface area will be equal to size of ……
a) table tennis
b) tennis court
c) football ground
d) cricket ground
Explanation:Your lungs are one of the largest organs in your body. The surface area of both lungs is roughly the same size as a tennis court and the total length of the airways running through them is 1,500 miles.
