Human Respiratory System Functions

The video explains the process of breathing, starting with air entering through the nose or mouth. The conchae in the nose humidify, warm, and filter the air. Air then moves through the pharynx and trachea, reaching the bronchi and bronchioles, and finally the alveoli. In the alveoli, oxygen is exchanged for carbon dioxide in the blood. The diaphragm plays a crucial role by contracting and relaxing to allow lung expansion and contraction. This process ensures oxygen is delivered to the heart and carbon dioxide is expelled.

What is the role of the conchae in the nasal passage?

• They filter out oxygen from the air.

• They help humidify, trap particles, and warm the air.

• They cool down the air before it enters the lungs.

• They produce mucus to trap bacteria.

After passing through the trachea, where does the air go next?

• Into the pharynx

• Into the bronchi

• Directly into the alveoli

• Into the diaphragm

Where does the gas exchange occur in the lungs?

• In the trachea

• In the bronchi

• In the alveoli

• In the pharynx

What happens to carbon dioxide during the breathing process?

• It is exhaled through the air passage.

• It remains in the blood.

• It is converted into oxygen.

• It is absorbed by the alveoli.

What is the function of the diaphragm during breathing?

• It filters the air entering the lungs.

• It contracts to allow the lungs to expand and relaxes to help exhale.

• It warms the air before it enters the lungs.

• It produces mucus to trap particles.