Breathing System

Question 1

Nose

Answer 1

You inhale through your nose, mucus and hairs trap bacteria and particles, air is warmed ans moistened. Warm air helps oxygen pass from the lungs to the bloodstream easily.

Question 2

Trachea

Answer 2

Also known as the windpipe, it carries air to and from the lungs it is made of cartilage to stop it from collapsing

Question 3

Bronchus and bronchioles

Answer 3

We have two bronchi, each bronchus carries air between the trachea and a lung. The two bronchi sub-divide many times to form tiny tubes called bronchioles. Bronchioles carries air to and from the alveoli.

Question 4

Alveolus

Answer 4

Each lung contains millions of air sacs called alveoli. Function of alveolus is called gas exchange. The gases pass in each direction by a process called diffusion. For diffusion each alveolus has a very thin lining.