Dissection: Lungs

The video tutorial explores the respiratory system, detailing how oxygen travels from the atmosphere into the bloodstream. It demonstrates the use of tools to examine a mammal's lungs, explaining the structure and function of the trachea, bronchi, bronchioles, and alveoli. The role of the diaphragm in lung inflation is discussed, along with the pleural membrane's function. The tutorial also covers how ventilators assist patients who cannot breathe unaided, providing necessary oxygen.

What is the primary purpose of the respiratory system?

• To exchange oxygen and carbon dioxide

• To circulate blood throughout the body

• To protect against infections

• To digest food

What is the function of the pleural membrane?

• To transport oxygen in the blood

• To filter air entering the lungs

• To protect the lungs from infections

• To reduce friction during lung expansion and contraction

How does the diaphragm contribute to lung inflation?

• By pushing air out of the lungs

• By contracting to increase chest space

• By absorbing carbon dioxide

• By filtering air

What keeps the trachea open regardless of the mammal's movement?

• Bronchioles

• Rings of solid cartilage

• Pleural membrane

• Muscle contractions

Where does the exchange of oxygen and carbon dioxide occur in the lungs?

• In the bronchi

• In the trachea

• In the alveoli

• In the pleural membrane

What is the role of ventilators for patients who cannot breathe on their own?

• To remove carbon dioxide from the blood

• To manually inflate the lungs

• To deliver oxygen to the lungs at regular intervals

• To stimulate the diaphragm

How do ventilators assist patients with breathing difficulties?

• By reducing lung inflammation

• By strengthening the diaphragm

• By mechanically or manually blowing air into the lungs

• By increasing blood circulation