Dead space air is ___

Time taken in breathing ___

Which vertebrates have the most well-developed respiratory system?

Which network comprises the lung?

What percentage of carbon dioxide transport in the form of carbamino haemoglobin?

Strength of inspiration and expiration can be increased with the help of_______

What is the primary site for exchange of gases in lungs?

A fish which is taken and brought to land dies within a few minutes because of _____