Exploring the Pulmonary System and Lungs

The video explains the process of respiration, focusing on how oxygen is inhaled and carbon dioxide is exhaled. It covers the anatomy of the respiratory system, including the nose, mouth, pharynx, larynx, trachea, bronchi, bronchioles, and alveoli. The video also discusses the role of the diaphragm in breathing and the pulmonary circulation system, highlighting how oxygen is absorbed into the blood and carbon dioxide is released.

Why do humans need oxygen?

• To create water

• To metabolize food into ATP

• For photosynthesis

• To produce carbon dioxide

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What connects the nasal cavity and the oral cavity at the back?

• Esophagus

• Larynx

• Pharynx

• Trachea

Which part of the respiratory system is also known as the voice box?

• Pharynx

• Esophagus

• Larynx

• Trachea

What is the primary function of the larynx?

• To digest food

• To produce sound

• To transport blood

• To facilitate breathing

What is the role of the trachea?

• To exchange gases with blood

• To carry food to the stomach

• To facilitate sound production

• To transport air to the bronchi

What is the main purpose of alveoli in the lungs?

• To produce mucus

• To store oxygen

• To filter air

• To exchange gases

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What is the significance of the pulmonary arteries and veins?

• They transport oxygenated blood from the lungs

• They carry nutrients to the heart

• They carry deoxygenated blood to the lungs

• Both B and C

What happens to the thoracic diaphragm when you inhale?

• It contracts and moves upwards

• It relaxes and moves downwards

• It contracts and moves downwards

• It relaxes and moves upwards

How does the body ensure air flows from high to low pressure during inhalation?

• By decreasing lung volume

• By contracting the esophagus

• By increasing lung volume

• By relaxing the bronchioles

Approximately how many alveoli are in each lung?

• 300 million

• 3 million

• 300 thousand

• 30 million