Understanding the Human Respiratory System

What part of the human respiratory system does the straw in the lung model represent?

• The diaphragm

• The alveoli

• The windpipe

• The rib cage

In the lung model, what does the balloon represent in the human respiratory system?

• The lungs

• The heart

• The trachea

• The diaphragm

What happens to the balloon in the lung model when the rubber sheet is pulled downwards?

• It bursts

• It inflates

• It stays the same

• It deflates

Which part of the lung model simulates the diaphragm's movement?

• The straw

• The balloon

• The rubber sheet

• The plastic bottle

What is the effect on the size of the lungs when air moves into them?

• The size fluctuates

• The size increases

• The size remains unchanged

• The size decreases