Question

explain the internal and external structure of the heart

Answer 1

The internal structure of the heartconsists 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.
The external structure.....
1. Right atrium - This is the chamber that is used to carry deoxygenated blood straight into the neighbouring chamber, the right ventricle.
2. Right ventricle - The right ventricle is the chamber that helps pump blood to the lungs and pick up oxygen from there and then release carbon dioxide.
3. Left atrium - The left atrium is the chamber which carries all the oxygenated blood and flows it into the left ventricle.
4. Left ventricle - The left ventricle is the chamber that pumps the oxygenated blood throughout the entire body.