Question

Write about the external structure of the heart?​

Answer 1

Answer:

The heart is enclosed in a protective sac, the pericardium, which also contains a small amount of fluid. The wall of the heart is made up of three layers: epicardium, myocardium, and endocardium. The heart pumps blood with a rhythm determined by a group of pacemaking cells in the sinoatrial node.

Answer 2

$\large {\boxed {\underline {\boxed {\underline {\boxed {\boxed {\red {\sf {Answer}}}}}}}}}$

The heart is enclosed in a protective sac, the pericardium, which also contains a small amount of fluid. The wall of the heart is made up of three layers: epicardium, myocardium, and endocardium. The heart pumps blood with a rhythm determined by a group of pacemaking cells in the sinoatrial node.

thank you ✌️