Page 257 - Ultimate Visual Dictionary (DK)

RESPIRATOR Y SYSTEM
STRUCTURES OF THORACIC CAVITY GASEOUS EXCHANGE IN ALVEOLUS

Oxygen diffuses
Epiglottis into blood
Hyoid bone
Oxygenated
blood
Thyroid cartilage
Alveolus

Thyroid
gland Cricoid
cartilage
Apex of
lung Trachea Deoxygenated
blood rich in
carbon dioxide
Superior Aorta
vena cava
Upper Upper
lobe of lobe of Carbon dioxide
right lung left lung diffuses from
blood into alveolus
Horizontal Pulmonary
fissure trunk MECHANISM
OF RESPIRATION
Left pulmonary INSPIRATION
Oblique artery Air drawn
fissure Lung into lungs
expands
Heart

Lower
lobe of
left lung
Secondary
bronchus
Intercostal
Tertiary Diaphragm muscles
bronchus contracts contract
and flattens

EXPIRATION
Lung Air forced
contracts out of
lungs

Lower
lobe of
right lung Muscular wall Diaphragm
of diaphragm relaxes and
Middle lobe Right crus Abdominal Left crus of moves up Intercostal
of right lung of diaphragm aorta diaphragm Esophagus muscles relax

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