1. Respiratory System

2. Purpose Breathing is not the same thing as respiration
Respiration gets oxygen from the environment and removes carbon dioxide from the body
Breathing is inhaling and exhaling

3. Path of airflow Nasal cavity
Openings of the nose where oxygen first enters the body
Have hair-like structures called cilia
Mucus traps dust from the air in the nose
Sneezing gets dust out of the body

4. Path of airflow Pharynx (Throat) Where air enters the body Larynx
The voice box which contains the vocal chords
Vibrations of the vocal chords produces sound

5. Path of airflow Trachea Also known as the windpipe Epiglottis
A flap that keeps food from entering the airway

6. Path of airflow Trachea branches into two bronchi
The bronchi branch into smaller and smaller branches called bronchioles
Air enters the lungs from the bronchioles
Alveoli are tiny sacs of air used for gas exchange

7. Gas Exchange
A process in which the body exchanges oxygen with carbon dioxide (waste product)
This occurs at the
capillaries of tiny air
sacs called alveoli
Diffusion

8. Cellular Respiration
A process in which oxygen is used to release energy
Glucose and oxygen are needed for cellular respiration
Carbon dioxide is a waste product

9. Breathing Process Breathing- movement of the diaphragm
Inhalation – air is brought into the lungs
Diaphragm contracts (flattens) and lowers
Ribs raise up and out
Lungs inflate because during breathing which “sucks” air into the lungs

10. Breathing Process
Exhalation – air is pushed out of the lungs
Diaphragm relaxes and moves upward
Ribs drop down and in
Lungs deflate and this
pushes the air out
of the lungs

12. Respiratory Disorders
Asthma- Long term disease of the lungs that narrows the airways
Symptoms-Wheezing, chest tightness, shortness of breath and coughing
Treatment- medication (inhaler)

14. Respiratory Disorders
Emphysema- lungs lose their elasticity and the air sacs become damaged caused by years of smoking
Symptoms- shallow breathing and even death.
Treatment- stop smoking and use of oxygen tank for additional help