The video explains the respiratory system, focusing on the lungs, diaphragm, and airways. It covers how oxygen is inhaled and carbon dioxide is exhaled, detailing the roles of the nose, mouth, trachea, bronchi, bronchioles, and alveoli. The video also includes fun facts and a review of key concepts, emphasizing the importance of the respiratory system for survival.

What is the primary function of the respiratory system?

• To digest food

• To produce hormones

• To circulate blood

• To bring oxygen into the body

Which organ is smaller on the left side to make room for the heart?

• Trachea

• Right lung

• Left lung

• Diaphragm

What muscle helps the lungs in the breathing process?

• Heart

• Diaphragm

• Stomach

• Liver

What is the role of cilia in the respiratory system?

• To produce mucus

• To filter air and remove unwanted substances

• To pump blood

• To absorb oxygen

What is the function of the epiglottis?

• To filter air

• To help in digestion

• To produce sound

• To cover the air passage during swallowing

Where does the exchange of oxygen and carbon dioxide occur?

• In the trachea

• In the bronchi

• In the diaphragm

• In the alveoli

What process produces carbon dioxide in the cells?

• Respiration

• Diffusion

• Photosynthesis

• Osmosis

How many alveoli are there in a person's lungs?

• 600 million

• 60 million

• 6 million

• 600,000

What is the chest cavity also known as?

• Cranium

• Pelvis

• Abdomen

• Thorax

How many breaths does a person take approximately in a day?

• 2 million

• 200,000

• 20,000

• 2,000