Breathing and E...

A person has 400 million alveoli per lung with an average radius of 0.1m for each alveolus. Considering the alveoli are spherical in shape, the total respiratory surface of that person is closest to.

Which is correct?

In a resting person, oxygen saturation of haemoglobin as blood leaves the tissue capillaries is?

Listed are four respiratory capacities (a-d) and four jumbled respiratory volumes of a normal human adult.

Respiration without a distinct respiratory organ occurs in

What is function of region labelled as 'a' in the given diagram?

If levels of carboxyhaemoglobin in blood reaches up to ...... the functioning of central nervous system is severely affected which causes death?

Arrange the following in order of increasing volume.
$$1$$. Tidal volume 

The protein $$\alpha-1$$ antitrypsin is used to treat which of the following disease?

The volume of air inspired or expired by a healthy man per minute is