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Nasal Cavity / Nose
• Organ where air enters the respiratory system
• Nasal Nares – entrance to nasal
cavities
• Mucous lined Cavities– Moisten/Warm Air
• Smell
Pharynx
• Tube that leads air from nose/mouth.
• 3 sections • Nasopharynx
– behind nasal cavities
• oropharynx – back of mouth
• laryngopharynx – bottom of throat.
• Air/Food share
Larynx
• Voice Box• Below the Pharynx. • Made of cartilage
rings.– Vibrate with air to
create sounds – Adam's apple
Epiglottis
• Cartilage flap that covers the larynx opening when swallowing food or water.
• Directs food to esophagus
• Prevents them from entering lungs.
Bronchi / Bronchial Tree
• Branches off the Trachea.
• Direct air into lungs.– Primary first branch
that leads into the lung– Secondary are those
that branch off primary, smaller.
– There are 10 Tertiary Bonchi
Lungs
• Large organs where gas exchange is facilitated.
• Divided up into 10 sub-compartments called Lobes,
• Right is smaller due to heart
Pleural Space• The space between
the Parietal and Visceral Pleura
• Filled with a small amount of fluid
• Reduce Friction
Diaphragm
• Smooth Muscle – "engine" for the
respiratory System.
• Causes Inspiration• Dome Shaped. • Separates
Thorasic/Abdominal Cavity.
• Flattens w/ Inspiration
Primary Bronchi
• Right and Left Branches off the Trachea
• Direct Air into the Right and Left Lungs
Bronchioles
• Another Name for Tertiary Bronchi
• They Branch off into the different lobes of the lungs
Alveolar Ducts
• Smaller tubes that branch off the bronchioles in the lungs.
• Direct gasses into/out of the alveolar sac