Human Biology

1.32. Respiratory System Organs http://www.ck12.org

FIGURE 1.58

"Grape-like" alveoli in the lungs.

Vocabulary

• alveoli: Tiny sacs in the lungs where gas exchange takes place.


• bronchi: Air passages in the respiratory tract that conduct air into the lungs.


• diaphragm: Sheet of muscle that spreads across the bottom of the rib cage.


• larynx: Respiratory organ between the pharynx and trachea; also called the voice box because it allows the
  production of vocal sounds.


• pharynx: Long, tubular organ that connects the mouth and nasal cavity with the larynx; food and air pass
  through it.


• trachea: Long, tubular organ, also called the wind pipe, that carries air between the larynx and lungs.

Summary

• The organs of the respiratory system include the lungs, pharynx, larynx, trachea, and bronchi.

Practice

Use the resource below to answer the questions that follow.

• The Respiratory Systemat http://www.youtube.com/watch?v=IWXAhe0w_CE (3:09)

MEDIA

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