Respiratory System

Front

What is the main function of the respiratory system?

Back

To facilitate the exchange of oxygen and carbon dioxide between the body and the environment.

Front

What is the trachea commonly known as?

Back

The windpipe.

Front

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

Back

It is the passage that air travels through after the nose and before it enters the trachea.

Front

What are alveoli?

Back

Tiny air sacs in the lungs where gas exchange occurs.

Front

What is the function of the bronchi?

Back

To carry air from the trachea to the lungs.

Front

What is the diaphragm?

Back

A muscle that helps in breathing by contracting and relaxing to change the volume of the thoracic cavity.

Front

What happens during inhalation?

Back

The diaphragm contracts, expanding the chest cavity and drawing air into the lungs.

Front

What happens during exhalation?

Back

The diaphragm relaxes, reducing the chest cavity volume and pushing air out of the lungs.

Front

What is the role of the nasal cavity?

Back

To filter, warm, and humidify the air before it enters the lungs.

Front

What is the difference between the upper and lower respiratory tracts?

Back

The upper respiratory tract includes the nose, nasal cavity, and pharynx; the lower respiratory tract includes the trachea, bronchi, and lungs.