Worksheet 3.2.1 Human respiratory system

Front

What is the role of the diaphragm in breathing?

Back

The diaphragm contracts and moves downward during inhalation, and relaxes and moves upward during exhalation.

Front

What is the main advantage of alveoli in the respiratory system?

Back

Alveoli provide a large surface area for more oxygen to diffuse into the blood.

Front

Which organ is a part of the respiratory system?

Back

Lungs.

Front

What is the function of intercostal muscles?

Back

Intercostal muscles assist in breathing by expanding and contracting the rib cage.

Front

What is the name of the region where the nose and mouth are connected?

Back

Pharynx.

Front

What is the primary function of the respiratory system?

Back

To facilitate gas exchange, allowing oxygen to enter the body and carbon dioxide to be expelled.

Front

What is the process of inhalation?

Back

Inhalation is the process of taking air into the lungs, involving the contraction of the diaphragm and intercostal muscles.

Front

What is the process of exhalation?

Back

Exhalation is the process of expelling air from the lungs, involving the relaxation of the diaphragm and intercostal muscles.

Front

What are the tiny air sacs in the lungs called?

Back

Alveoli.

Front

What is the function of the trachea?

Back

The trachea, or windpipe, conducts air to and from the lungs.