Heartbeats occur due to a coordinated electrical and mechanical process. With each heartbeat, an electrical signal travels through the heart muscle, causing it to contract and pump blood. This coordinated action ensures that blood is efficiently circulated throughout the body.
The Electrical Signal
- An electrical impulse begins at the top of the heart and travels downwards.
- This electrical signal triggers the heart muscles to contract.
- This movement of electrical signals is consistent and rhythmic, ensuring steady heartbeats.
The Pumping Action
- As the electrical signal travels through the heart, the heart muscle contracts.
- This contraction squeezes the heart chambers, pushing blood out to the lungs and the rest of the body.
- Once the heart has pumped, it relaxes, preparing for the next heartbeat.
| Process | Description |
|---|---|
| Electrical Signal | An electrical impulse travels from the top to the bottom of the heart. |
| Contraction | The heart muscle contracts as the electrical signal moves through it. |
| Pumping Blood | The contraction of the heart muscle pumps blood out to the body and lungs. |
Summary
In essence, heart beats are a result of coordinated electrical signals that travel through the heart causing muscle contractions that pump blood throughout the body. This process ensures the circulation of oxygen and nutrients to all parts of the body. The electrical signal initiates the physical action of a heartbeat. The reference states, "With each heartbeat, an electrical signal travels from the top of the heart to the bottom. As the signal travels, it causes the heart to contract and pump blood."
