the respiratory system exchanges oxygen and carbon dioxide between the blood, air & tissues
TRANSCRIPT
THE RESPIRATORY
SYSTEM Exchanges oxygen and carbon dioxide between the blood, air & tissues
NOSE & MOUTH Entryway for air
PHARYNX
Common pathway for food and air
EPIGLOTTIS
Flap that closes off the trachea when swallowing (prevents choking)
LARYNX
Voice box containing vocal cords
TRACHEA
Tube lined with cartilage rings (carries air to lungs)
trachea
BRONCHI &BRONCHIOLES Branch off from trachea into lung
bronchi
bronchioles
ALVEOLI
Grape-like air sacs responsible for exchanging gases with the blood
LUNGS
Have large surface area for gas exchange
HEALTHY LUNG
EMPHYSEMA
LUNG CANCER
DIAPHRAGM Muscular sheet that contracts to bring air into & relaxes to push air out of the lung
NOSE
EPIGLOTTISLARYNX
BRONCHIOLES
ALVEOLI
TRACHEA
DIAPHRAGM
PHARYNX
BRONCHI
MOUTH
LUNGS
Inhalation Exhalation
Air in
Air out
Diaphragm
Ribs
rise
Ribs
fall
Mechanisms of Breathing
4.ASTHMA
narrowing of bronchial tubes and swelling of the mucous membranes. (allergy-related)
5.
Alveoli loose their elasticity
(stay filled w/air after exhaling)
Diseases caused by smoking:
The 411 on Tobacco1. Ingredients- cyanide
- carbon monoxide
- nicotine (addictive drug that stimulates nervous system)
In regular respiration, O2 (oxygen) hooks onto hemoglobin in the
blood & is transported to the body.
When smoke is inhaled, O2 is replaced by CO – carbon monoxide
(which is toxic).