The Human Respiratory System

Human Respiratory System

• 3. Trachea
• a. Connects with the larynx and is covered by the epiglottis to prevent choking.
• b. The Trachea is kept open by horseshoe rings of cartilage.
• c. Lined with cilia and mucus which trap foreign matter

Human Respiratory System

• 4. Bronchi and Bronchioles
• a. Bronchi: 2 cartilage ringed tubes that branch off the trachea
• -Lined with cilia
• -Entrance way to the lungs
• b. Bronchioles: branch off the bronchi
• -Divide and become smaller, thinner with less cartilage

Human Respiratory System

• 5. Alveoli
• a. Tiny air chambers at the end of the bronchioles.
• b. Walls are 1 cell thick and moist from mucus.
• c. Surrounded by capillaries.
• d. Through the alveoli walls, the exchange of oxygen and carbon dioxide takes place.

• Alveoli

• Bronchiole

• Capillary

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