Living Things: Human Respiratory System

The video tutorial explains the structure and mechanism of the respiratory system. It begins with an overview of the system, highlighting the nose, pharynx, trachea, lungs, and diaphragm. The tutorial then details the mechanism of respiration, focusing on the processes of inhalation and exhalation, where oxygen-rich air enters the lungs and carbon dioxide-rich air exits.

What is the first organ of the respiratory system that helps filter the air we breathe?

• Pharynx

• Lungs

• Nose

• Trachea

Which structure is a common cavity that leads to both the esophagus and trachea?

• Pharynx

• Alveoli

• Bronchus

• Diaphragm

What protects the lungs within the thoracic cavity?

• Rib cage

• Bronchioles

• Diaphragm

• Alveoli

What is the role of the diaphragm in the respiratory system?

• It filters air entering the lungs

• It separates the thoracic and abdominal cavities

• It is the site of gas exchange

• It transports oxygen to the blood

During which process does air rich in carbon dioxide leave the lungs?

• Ventilation

• Oxygenation

• Exhalation

• Inhalation