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Respiratory: overview

The respiratory system is composed of tubular passages that conduct outside air into lung alveoli where oxygen and carbon dioxide are exchanged. Passages that only conduct air belong to the conducting portion of the respiratory system; passages that participate in gas exchange belong to the respiratory portion of the system.

Nasal cavities > <p>Respiratory passages located outside the lung are referred to as extrapulmonary. These frontal and mid-sagittal views of the head and neck illustrate the extrapulmonary components of the conducting portion of the respiratory system. The inset shows the trachea dividing into two primary bronchi (in red), one supplying each lung.</p>

Nasal cavities >

Respiratory passages located outside the lung are referred to as extrapulmonary. These frontal and mid-sagittal views of the head and neck illustrate the extrapulmonary components of the conducting portion of the respiratory system. The inset shows the trachea dividing into two primary bronchi (in red), one supplying each lung.

Pharynx <p>Respiratory passages located outside the lung are referred to as extrapulmonary. These frontal and mid-sagittal views of the head and neck illustrate the extrapulmonary components of the conducting portion of the respiratory system. The inset shows the trachea dividing into two primary bronchi (in red), one supplying each lung.</p>

Pharynx

Respiratory passages located outside the lung are referred to as extrapulmonary. These frontal and mid-sagittal views of the head and neck illustrate the extrapulmonary components of the conducting portion of the respiratory system. The inset shows the trachea dividing into two primary bronchi (in red), one supplying each lung.

Larynx <p>Respiratory passages located outside the lung are referred to as extrapulmonary. These frontal and mid-sagittal views of the head and neck illustrate the extrapulmonary components of the conducting portion of the respiratory system. The inset shows the trachea dividing into two primary bronchi (in red), one supplying each lung.</p>

Larynx

Respiratory passages located outside the lung are referred to as extrapulmonary. These frontal and mid-sagittal views of the head and neck illustrate the extrapulmonary components of the conducting portion of the respiratory system. The inset shows the trachea dividing into two primary bronchi (in red), one supplying each lung.

Trachea <p>Respiratory passages located outside the lung are referred to as extrapulmonary. These frontal and mid-sagittal views of the head and neck illustrate the extrapulmonary components of the conducting portion of the respiratory system. The inset shows the trachea dividing into two primary bronchi (in red), one supplying each lung.</p>

Trachea

Respiratory passages located outside the lung are referred to as extrapulmonary. These frontal and mid-sagittal views of the head and neck illustrate the extrapulmonary components of the conducting portion of the respiratory system. The inset shows the trachea dividing into two primary bronchi (in red), one supplying each lung.

Primary bronchi <p>Respiratory passages located outside the lung are referred to as extrapulmonary. These frontal and mid-sagittal views of the head and neck illustrate the extrapulmonary components of the conducting portion of the respiratory system. The inset shows the trachea dividing into two primary bronchi (in red), one supplying each lung.</p>

Primary bronchi

Respiratory passages located outside the lung are referred to as extrapulmonary. These frontal and mid-sagittal views of the head and neck illustrate the extrapulmonary components of the conducting portion of the respiratory system. The inset shows the trachea dividing into two primary bronchi (in red), one supplying each lung.

Lungs <p>Respiratory passages located outside the lung are referred to as extrapulmonary. These frontal and mid-sagittal views of the head and neck illustrate the extrapulmonary components of the conducting portion of the respiratory system. The inset shows the trachea dividing into two primary bronchi (in red), one supplying each lung.</p>

Lungs

Respiratory passages located outside the lung are referred to as extrapulmonary. These frontal and mid-sagittal views of the head and neck illustrate the extrapulmonary components of the conducting portion of the respiratory system. The inset shows the trachea dividing into two primary bronchi (in red), one supplying each lung.

Main Slide Nasal cavities >Pharynx Larynx Trachea Primary bronchi Lungs