Pericardium
Pronunciation: /ˈpɝˈˌɪkɑɹdˈaɪˈəm/
Pericardium (noun)
- A tough, double-layered sac that surrounds the heart and helps protect it.
- The space inside this sac holds fluid that reduces friction as the heart beats.
Examples
- The pericardium covers the heart.
- Doctors examine the pericardium around the heart.