cardiac-sac
nounUK /ˈkɑːdiæk sæk/
US /ˈkɑːrdiæk sæk/
The little bag around your heart that keeps it safe.
The doctor said the heart sits inside a cardiac-sac.
RELATED WORDS
OTHER MEANINGS
2. The thin, fluid-filled membrane that protects and lubricates the heart.
The cardiac-sac helps the heart beat smoothly without rubbing.
3. A protective layer doctors study when checking for heart swelling.
Swelling of the cardiac-sac can make chest pain.
4. The outer covering of the heart in animals with backbones.
In frogs, the cardiac-sac is easy to see during dissection.