Respiratory System Concepts

The video explains the critical role of oxygen in human survival, highlighting the respiratory system's function in transporting oxygen and removing carbon dioxide. It details the mechanics of breathing, focusing on the diaphragm and airways, and describes the gas exchange process in the alveoli and capillaries. Additionally, it covers the lung's defense mechanisms against airborne particles, emphasizing the importance of respiratory health.

How long can a person survive without air?

• Two days

• Two hours

• Two weeks

• Two minutes

What is the primary function of the respiratory system?

• To transport oxygen and remove carbon dioxide

• To produce energy

• To circulate blood

• To digest food

What is the main muscle involved in breathing?

• Heart

• Liver

• Stomach

• Diaphragm

How does the diaphragm help in breathing?

• By filtering air

• By expanding and contracting the chest

• By pumping blood

• By digesting food

Where does air travel after passing through the trachea?

• To the liver

• To the bronchi

• To the heart

• To the stomach

What are the small tubes that the bronchi divide into called?

• Bronchioles

• Alveoli

• Capillaries

• Veins

Where does the exchange of gases occur in the lungs?

• In the trachea

• In the bronchi

• In the alveoli

• In the diaphragm

What gas is naturally produced by our body and needs to be expelled?

• Nitrogen

• Hydrogen

• Oxygen

• Carbon dioxide

What are the tiny blood vessels that wrap around the alveoli called?

• Bronchioles

• Capillaries

• Veins

• Arteries

What helps to capture and remove particles from the air we breathe?

• White blood cells

• Alveoli

• Cilia and mucus

• Red blood cells