Question

interrior structure of heart​

Answer 1

Answer:

The heart is a strong muscular pump that circulates and pumps about 2,000 gallons of blood each day and contracts and expands about 100,000 times per day. The normal heart is only as big as an average clenched fist and sits behind the breast bone, or sternum, slightly to the left in between the lungs. Large blood vessels leave and enter the heart and help to keep it in position. The internal structure of the heart consists of four hollow spaces, or chambers, divided by a tissue wall, called the cardiac septum. The flow of blood through the heart is regulated by four valves.

Explanation:

make me brainlist please please please please please please please please please please please please please please please please please please please please please please please please please please please please please