functions of the respiratory system
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Functions of the Respiratory System. Brings oxygen in from the environment for our body cells, and removes carbon dioxide waste. Main components: Nose Pharynx : part of the throat behind nasal cavity and mouth. Larynx : voice box, houses vocal cords.

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functions of the respiratory system
Functions of the Respiratory System
  • Brings oxygen in from the environment for our body cells, and removes carbon dioxide waste.
  • Main components:
    • Nose
    • Pharynx: part of the throat behind nasal cavity and mouth.
    • Larynx: voice box, houses vocal cords.
    • Trachea: windpipe, air travels from trachea toward the lungs.
respiratory system
Respiratory System
  • Components continued:
    • Bronchi: or bronchus (singular). The bronchi bring air into the lungs.
    • Bronchioles: bronchi branch into smaller airways that carry air to the alveoli.
    • Alveolus: or Alveoli (plural). Structures in the lungs where gas exchange occurs.
      • Oxygen leaves the alveoli and goes into the bloodstream to be taken to our cells.
      • Carbon dioxide leaves the blood and into the alveoli to be breathed out.
slide3

Nose

Pharynx

Larynx

Trachea

Bronchus

Bronchioles

LEFTLUNG

RIGHTLUNG

Alveolus

the lungs
The Lungs
  • The lungs: expand and contract to bring air in and force air out of the body.
  • When we bring air into the body it is called inhalation.
  • When we force air out (breathe out) it is called exhalation.
  • The process of breathing in and out is controlled by a muscle called the diaphragm.
slide6

LEFTLUNG

RIGHTLUNG

Diaphragm

breathing
Breathing
  • The process of breathing is known as respiration.
  • When the diaphragm contracts and pulls downward the lungs expand and pull air in.
  • When the diaphragm relaxes it pushes upward and the lungs contract and push air out.
disorders of the respiratory system
Disorders of the Respiratory System
  • Lung damage can occur due because of breathing in chemicals (like pollutants, cigarette smoke, asbestos, and fumes).
  • Emphysema: lung tissue damage, that causes problems breathing.
    • Most cases of emphysema develop in smokers, or those exposed to second hand smoke.
    • Tar buildup in the lungs causes lung tissue damage.
review
Review
  • Air moves through the respiratory system:
    • Nose
    • Pharynx
    • Larynx
    • Trachea
    • Bronchi
    • Lungs
    • Bronchioles
    • Alveoli
  • Breathing in: Inhalation
  • Breathing out: Exhalation
  • Review Video
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