The heart is a hollow organ
divided into 4 sections or chambers. The innermost layer of these chambers is called the endocardium. Though the muscular wall of the heart is called the myocardium,
the sac called the pericardium surrounds the heart.
The heart is a hollow organ
divided into 4 sections or chambers. The innermost layer of these chambers is called the endocardium. Though the muscular wall of the heart is called the myocardium,
the sac called the pericardium surrounds the heart.