Download The Respiratory System

The Respiratory System
http://137.222.110.150/calnet/irish_cal/exotics/respiratory%20system.jpg
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
The Oxygen Delivery System
• Main function - to supply the blood in the
circulatory system with oxygen
• Does this through breathing
Breathing and Respiration
are NOT the same thing!
Breathing
Moving air in
and out of the
lungs
Cellular Respiration
• Chemical reaction that releases
energy
• Occurs in the mitochondria of the
cell (called cellular respiration)
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.
Exhalation
•
•
•
•
•
Breathing out
Get rid of carbon dioxide
Rib muscles relax
Diaphragm muscle relaxes
Tissue returns to resting position and
forces (pushes) air out
Parts of the Respiratory System
• Mouth
• Nose
• Trachea
– splits into bronchi
– bronchioles
• Lungs
– Bronchioles
– Alveoli
• Diaphragm
http://www.nlm.nih.gov/medlineplus/
http://www.nlm.nih.gov/medlineplus/
http://biology.clc.uc.edu/courses/bio105/respirat.htm
Pathway of Oxygen
1. Air into nose
or mouth
2. The air moves through the
pharynx and larynx and the
epiglottis opens.
3. Air goes to the Trachea
9. Bloodstream
8. Capillaries
(picks up O2 and
drops off CO2)
7. Alveoli
4. Bronchi
5. Lungs
6. Bronchioles
Nose
Mouth
Pharynx
Larynx
Trachea
Lungs
Bronchi
Bronchi
Bronchioles
Diaphragm
Alveoli
Pathway of Carbon Dioxide
1. Bloodstream
2. Capillaries
(drops off CO2
and picks up O2)
3. Alveoli
4. Bronchioles
9. Air out of nose
or mouth
8. Epiglottis opens then CO2 moves
through larynx and pharynx
7. Trachea
6. Bronchi
5. Lungs
Lungs
•
•
•
•
Main organs of the respiratory system
Bronchial tubes
Many smaller tubes
Alveoli (alveolus) – surrounded by
capillaries
• Average adult's lungs contain about 600
million of these air-filled sacs
http://users.tpg.com.au/users/amcgann/body/respiratory.html
Bronchi
• The trachea splits into 2 tubes, 1 to each
lung
• The bronchi splits into smaller branches in
the lungs called bronchioles
Alveoli
• Tiny sacks surrounded by capillaries
• Where gas exchange occurs
• Capillaries pick up oxygen and drop of
carbon dioxide
http://users.tpg.com.au/users/amcgann/body/respiratory.html
http://www.mtsinai.org/
The Diaphragm
• The muscle that controls the breathing
process.
• The diaphragm flattens to cause the chest
to expand and air is pulled into the lungs.
• When the diaphragm relaxes, the chest
collapses and the air in the lungs is forced
out.
http://users.tpg.com.au/users/amcgann/body/respiratory.html