Air enters the  ____________  through the nasal cavity .

____________  is a part of respiratory system .

The nasal cavity leads into an organ called the  ___________________ .

From the pharynx, air passes into a chamber called the ______________ .

The hair, present in the nostrils, stop the dust and germs, from entering the _________________ .

_______________ is an air- filled, hollow and large space that is present above the nose and in the middle of the face.

Lungs are present in chest cavity. This cavity is surrounded by ribs on the sides. A large muscular sheet called diaphragm form the floor of the chest cavity. During inhalation the ribs move_____________ and diaphragm moves____________.

When human body cells are deprived of oxygen then 

The air that we breath in passes to the tiny sacs called

Which of the following are correct ?

(a) The pharynx is a muscular tube that connects the oral and the nasal cavity.

(b) Pharynx is the part of throat behind the mouth and nasal cavity, and above the oesophagus (food pipe) and larynx(voice box).

(c) Larynx is the passage way for air between the pharynx above and trachea below.