Transcript Respiratory System

Respiratory
System
Air Traffic Control
1.
2.
3.
4.
5.
6.
7.
Air enters mouth or nose
Pharynx
Epiglottis
Trachea
Bronchi
Bronchiole
Alveoli
Keeping It Clean
Nose hair
Cilia
Mucus
* Cilia can be killed by smoking*
Gas Exchange
• Alveoli have thin walls
• Capillary mesh around each
alveolus
• Diffusion of oxygen and CO2 to
and from blood stream
Transport
• RBC – red blood cells
• RBCs contain hemoglobin which
contains iron
• Iron attracts and holds oxygen
Control
• Controlled by medulla oblongata
• Diaphragm pulls down, lungs
expand
***No vacuum, no breathing***