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

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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.


Functions of the respiratory system

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.


Functions of the respiratory system

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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