Health library

Count your heartbeats and breaths

Reviewed 11/5/2025

Sources

• MedlinePlus. "Lung Diseases." https://medlineplus.gov/lungdiseases.html.
• MedlinePlus. "Rapid Shallow Breathing." https://medlineplus.gov/ency/article/007198.htm.
• NOVA. "Amazing Heart Facts." https://www.pbs.org/wgbh/nova/heart/heartfacts.html.