Respiratory system

                       Respiratory System

The respiratory system is in charge of breathing:

Breathing makes two movements:

• First, we inhale air and it goes into the lungs.
• Then, we exhale air sending it out of the lungs.

The parts of the respiratory system are:

• The nostrils: Are two openings in the nose. They filter the air that we breath.
• The larynx: Contains the vocal cords. They produce sound.
• The bronchi: Are two branches of the trachea. They take air  to the lungs.
• The pharynx: Connects the larynx, the oesophagus and the trachea.
• The trachea: Is a tube that takes air into the bronchi.
• The lungs: Are spongy organs made up of small sac called alveoli.

When we breath, the oxygen in the air goes to 

the blood through  the alveoli, and the carbon 

dioxide from the blood is realized outside the 

body.