Answer:
The hearth has a special electrical system that helps it function and this is called: The cardiac conduction system. It controls the rhythm of the heartbeat and sends electrical signals through your body with each beat. The signals cause the heart to contract and pump blood. That's why when a person's heart stops beating, doctors use something called a defibrillator, it sends those signals through your body to try and get the heart to start up again.
Explanation:
Answer:
It is a measure of the pressure of the blood in your arteries at two stages of the heartbeat.
Explanation:
