State the position of Trachea in respiratory tract.

What is respiratory quotient?

State the functions of respiratory tract.

the structure which prevents the entry of food into respiratory tract is

Infection in the mucous membrane of respiratory tract and dry cough are the symtom of______.

What is respiratory quoient during germination of fatty seeds

Which of the following statement correctly describes the respiratory tract ? I the right lung is larger than the left II expiration is predominantly a passive phenomenon III air enters the lungs because of created negative pressure

Protein is respiratory substrate in

The respiratory tract is lined internally with a ________________ epithelium.

What are respiratory substrates ? Name the most common respiratory substrate .