Butterflies in the stomach

Look up have butterflies in one's stomach in Wiktionary, the free dictionary.

Butterflies in the stomach is the physical sensation in humans of a "fluttery" feeling in the stomach, caused by a reduction of blood flow to the organ. This is as a result of the release of adrenaline in the fight-or-flight response, which causes increased heart rate and blood pressure, consequently sending more blood to the muscles.[1]

See also

References

  1. ↑ Bennett, Howard (May 10, 2010). "Why do you get butterflies in your stomach?". The Washington Post. Retrieved 27 January 2013.