respiratory system parts
TRANSCRIPT
The Respiratory System
INTRODUCTION
The Respiratory System is what controls breathing. It brings in the oxygen your body needs and gets rid of the carbon dioxide that is left over. If you didn’t breathe you would pass out or die.
Functions
1. supplies the body with oxygen and disposes of carbon dioxide
2. filters inspired air3. produces sound4. contains receptors for smell5. rids the body of some excess water and
heat6. helps regulate blood pH
Respiratory System
Upper Respiratory Tract Lower Respiratory Tract
Conducting Airways
Respiratory Portion
Overall View of the Respiratory System
NOSE
NOSTRIL
MOUTH
NASAL CAVITY
PHARYNX
LARYNX
Upper Respiratory Tract
The part where the air is inhaled specifically through the nostrils
Rich supply of capillaries warm the inspired air
Filters and cleans inspired air
Nose
Conditions the air to be received by other areas of the respiratory tract
Nasal Cavity
Warm, moisten and filter incoming air
Add resonance to voice
Communicate with the nasal cavity by ducts
Paranasal sinuses
Commonly called the throatCommon pathway for both air and food
Pharynx
Also known as the windpipe
Where vocal cords can be foundLarynx
Paranasal Sinuses
Lower Respiratory Tract
A. Conducting Airways
• Main passageway to the lungs• Has cilia lining and mucus that trap dust
particles in airTrachea
• Two tubes (right and left) branching from trachea
• Project laterally toward each lungBronchi
• Most distal segment of the conducting zone
• Branch off the lesser bronchioles
Terminal Bronchioles
B. Respiratory Portion
Alveoli• Resembles cluster of grapes on a
stem• Inflate during inhalation and deflate
during exhalation
Lower Respiratory Tract
Other Parts
• Pleura – a thin membrane that surrounds the lungs
- lessens friction to lubricate the lungs when breathing
• Lobes – lungs are divided into these sections
- right lung has three lobes while left lung has only two
• Diaphragm – a powerful muscle nestled in the bottom of the rib cage; aids in respiration
Now let us have a look at the mechanism of breathing!