Question

What happens within the respiratory system when someone has hiccups? What can cause hiccups?

Answer 1

When the diaphragm becomes irritated, it yanks down, causing air to rush into the throat.

When this air hits the voice box, it causes a hiccup.

Hiccups can be caused by eating too quickly or too much, an irritated stomach or throat, or feelings of nervousness or excitement.

Answer 2

Hiccups are involuntary spasms of the diaphragm usually occurring when one consumes food or liquid too quickly. When this happens, the diaphragm becomes irritated and involuntarily contracts followed by a rapid closure of the vocal chords.

I hope this helped :)