# What is the pulmonary valve?

The pulmonary valve is called the pulmonary valve. Gray's Anatomy (1918) describes it as a three-cusp valve at the base of the pulmonary trunk.

## What it means

- A three-cusp valve at the base of the pulmonary trunk.
- Prevents blood from flowing back into the right ventricle.
- Opens with each ventricular contraction and closes as the ventricle relaxes.

## Action steps

1. Between the right ventricle and the pulmonary trunk.
2. Sits at the top of the right ventricle.
3. Its closure contributes to the second heart sound.

## Sources

- [Gray's Anatomy of the Human Body (1918)](https://www.bartleby.com/107/)

---
Canonical: https://bestanatomyanswers.com/answers/what-is-the-pulmonary-valve
Author: Best Anatomy Answers — https://bestanatomyanswers.com
Publisher: Best Anatomy Answers
Published: 2026-07-18T00:00:00+00:00
Modified: 2026-07-18T00:00:00+00:00
Last verified: 2026-07-18
License: Citation License 1.0 — https://bestexpertanswers.com/license
© Adolicious LLC