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HEALTH & EXERCISE
Module 8
Breathing and Gas Exchange
The Human Thorax
How the structure of the thorax enable ventilation of the lungs and gas exchange.
Trachea, cartilage rings, bronchi, bronchioles, alveoli, diaphragm, ribs, intercostal muscles
Trachea
Trachea – surrounded by cartilage rings that keep the tube open
Trachea – surrounded by cartilage rings that keep the tube open
Left lung
Trachea – surrounded by cartilage rings that keep the tube open
Left lung
Left bronchus, the major division of the trachea as it enters the lungs
Trachea – surrounded by cartilage rings that keep the tube open
Left lung
Left bronchus, the major division of the trachea as it enters the lungs
Bronchiole – a smaller branch off the larger bronchus
Trachea – surrounded by cartilage rings that keep the tube open
Left lung
Left bronchus, the major division of the trachea as it enters the lungs
Bronchiole – a smaller branch off the larger bronchus
Heart – responsible for pumping blood around the body
Trachea – surrounded by cartilage rings that keep the tube open
Left lung
Left bronchus, the major division of the trachea as it enters the lungs
Bronchiole – a smaller branch off the larger bronchus
Heart – responsible for pumping blood around the body
Rib – provides protection for lungs and heart
Trachea – surrounded by cartilage rings that keep the tube open
Left lung
Left bronchus, the major division of the trachea as it enters the lungs
Bronchiole – a smaller branch off the larger bronchus
Heart – responsible for pumping blood around the body
Rib – provides protection for lungs and heart
Right lung
Trachea – surrounded by cartilage rings that keep the tube open
Left lung
Left bronchus, the major division of the trachea as it enters the lungs
Bronchiole – a smaller branch off the larger bronchus
Heart – responsible for pumping blood around the body
Rib – provides protection for lungs and heart
Right lung
Right bronchus
Trachea – surrounded by cartilage rings that keep the tube open
Left lung
Left bronchus, the major division of the trachea as it enters the lungs
Bronchiole – a smaller branch off the larger bronchus
Heart – responsible for pumping blood around the body
Rib – provides protection for lungs and heart
Right lung
Right bronchus
Alveoli (air sacs), site of gas exchange
Trachea – surrounded by cartilage rings that keep the tube open
Left lung
Left bronchus, the major division of the trachea as it enters the lungs
Bronchiole – a smaller branch off the larger bronchus
Heart – responsible for pumping blood around the body
Rib – provides protection for lungs and heart
Right lung
Right bronchus
Alveoli (air sacs), site of gas exchange
Intercostal muscles lift ribs up & out
Gas Exchange in the alveoli
Gas Exchange in the alveoli
Oxygen from the air in the alveoli diffuses into the blood. At the same time, carbon dioxide from the blood diffuses into the alveoli.
Gas Exchange in the alveoli
Oxygen from the air in the alveoli diffuses into the blood. At the same time, carbon dioxide from the blood diffuses into the alveoli.
Oxygen dissolves in the moist lining
Gas Exchange in the alveoli
Oxygen from the air in the alveoli diffuses into the blood. At the same time, carbon dioxide from the blood diffuses into the alveoli.
Oxygen dissolves in the moist lining
Oxygen diffuses into the blood
Gas Exchange in the alveoli
Oxygen from the air in the alveoli diffuses into the blood. At the same time, carbon dioxide from the blood diffuses into the alveoli.
Oxygen dissolves in the moist lining
Oxygen diffuses into the blood
the blood carries oxygen to the cells
Gas Exchange in the alveoli
Oxygen from the air in the alveoli diffuses into the blood. At the same time, carbon dioxide from the blood diffuses into the alveoli.
Oxygen dissolves in the moist lining
Oxygen diffuses into the blood
the blood carries oxygen to the cells
cells of the body use oxygen for respiration
Gas Exchange in the alveoli
Oxygen from the air in the alveoli diffuses into the blood. At the same time, carbon dioxide from the blood diffuses into the alveoli.
Oxygen dissolves in the moist lining
Oxygen diffuses into the blood
the blood carries oxygen to the cells
cells of the body use oxygen for respiration carbon dioxide goes
into the blood
Gas Exchange in the alveoli
Oxygen from the air in the alveoli diffuses into the blood. At the same time, carbon dioxide from the blood diffuses into the alveoli.
Oxygen dissolves in the moist lining
Oxygen diffuses into the blood
the blood carries oxygen to the cells
cells of the body use oxygen for respiration carbon dioxide goes
into the blood
the blood carries carbon dioxide to the lungs
Gas Exchange in the alveoli
Oxygen from the air in the alveoli diffuses into the blood. At the same time, carbon dioxide from the blood diffuses into the alveoli.
Oxygen dissolves in the moist lining
Oxygen diffuses into the blood
the blood carries oxygen to the cells
cells of the body use oxygen for respiration carbon dioxide goes
into the blood
the blood carries carbon dioxide to the lungs
carbon dioxide diffuses into the alveoli
Breathing
Breathing
Breathing in (inspiration)
Breathing
Breathing in (inspiration)
intercostal muscles contract
Breathing
Breathing in (inspiration)
intercostal muscles contract
rib cage moves up and out
Breathing
Breathing in (inspiration)
intercostal muscles contract
rib cage moves up and out
diaphragm becomes flatter when the muscle contracts
Breathing
Breathing in (inspiration)
intercostal muscles contract
rib cage moves up and out
diaphragm becomes flatter when the muscle contracts
air rushes in
Breathing
Breathing in (inspiration)
intercostal muscles contract
rib cage moves up and out
diaphragm becomes flatter when the muscle contracts
Breathing out (expiration)intercostal muscles relax
Breathing
Breathing in (inspiration)
intercostal muscles contract
rib cage moves up and out
diaphragm becomes flatter when the muscle contracts
Breathing out (expiration)intercostal muscles relax
rib cage moves down and in
Breathing
Breathing in (inspiration)
intercostal muscles contract
rib cage moves up and out
diaphragm becomes flatter when the muscle contracts
Breathing out (expiration)intercostal muscles relax
rib cage moves down and in
diaphragm becomes dome-shaped when the muscle relaxes
Breathing
Breathing in (inspiration)
intercostal muscles contract
rib cage moves up and out
diaphragm becomes flatter when the muscle contracts
intercostal muscles relax
rib cage moves down and in
diaphragm becomes dome-shaped when the muscle relaxes
air is pushed out
