The Breathing System

Question 1

Nose

Answer 1

~ we inhale through our nose
~ hairs and mucus trap dirt and bacteria
~ air is warmed

Question 2

Trachea

Answer 2

Also known as windpipe
~ helps to carrie air to lungs
~made of c-shaped rings of rigid cartilage

Question 3

Bronchus and bronchioles

Answer 3

~ carries air between trachea and lung
~ Bronchioles carry air to and from the air-sacs, or alveoli.

Question 4

Alveolus

Answer 4

~ Each lung contains millions of tiny air-sacs called alveoli.
~ Oxygen passes from the air in the alveolus into the blood
vessels
~ At the same time carbon dioxide and water pass from the
blood vessels into each alveolus
~ The gases pass in each direction by a process called diffusion.