When the glottis becomes narrower, the pitch of sound goes up.

What does inspiration and expiration have in common?

oxygen entering the body and carbon dioxide leaving the body. What do inspiration and expiration have in common? They both use the same pathways.

What structure is part of the inspiration process?

During inspiration, the diaphragm and external intercostal muscles contract, causing the rib cage to expand and move outward, and expanding the thoracic cavity and lung volume. This creates a lower pressure within the lung than that of the atmosphere, causing air to be drawn into the lungs.