1. The Respiratory System

2. Function: The system of the body that deals with breathing
The body takes in the oxygen that it needs and removes the carbon dioxide that it doesn’t

3. Breathing and Respiration are NOT the same thing!

4. Moving air in and out of the lungs
Breathing
Moving air in and out of the lungs
Inhale and Exhale

5. Chemical reaction that releases energy
Cellular Respiration
Chemical reaction that releases energy

6. Parts of the System Nasal Passage way Trachea Lungs Diaphragm
Nose, Pharynx, and larynx
Trachea
splits into bronchi
bronchioles
Lungs
Bronchioles
Alveoli
Diaphragm

8. Air Pathway Nose Main passageway Protects and Heats the air Pharynx
Throat
Food and Air pass through this
Larynx
Voice box

9. Air Pathway Trachea (windpipe): Rings of cartilage
Mucus: traps foreign particles
Cilia: hair-like structures that move the particles out

10. Air Pathway Bronchi Two branches Carry oxygen to each lung Bronchioles
Many smaller tubes (<1mm diameter)

11. Air Pathway Alveoli surrounded by capillaries Grapelike structures
Blood travels single file
Grapelike structures
Where gas exchange occurs
Average adult's lungs contain about 600 million

13. The Diaphragm
The muscle that controls the breathing process.

14. Inhalation Breathing in Body gets oxygen from the air
Rib muscles contract to pull ribs up and out
Diaphragm muscle contracts to pull down the lungs
Tissue expands to force (pull) in air.

15. Exhalation Breathing out Get rid of carbon dioxide Rib muscles relax
Diaphragm muscle relaxes
Tissue returns to resting position and forces (pushes) air out

16. Respiratory Disorders
Asthma
Bronchioles narrow
Severe Acute Respiratory Syndrome (SARS)
Serious form of pneumonia
Emphysema
Alveoli have been damages
Lack of oxygen
Lung Cancer

17. Smokers lungs
Stuff in cigarettes

20. Average Lung Capacity Compare your results from the bubble lab
8th Grade Female Liters
8th Grade Male Liters
Adult Liters
Well trained athlete Liters