Pacemaker - GCSE Biology Definition
Reviewed by: Lára Marie McIvor
Last updated
A pacemaker is a small device that helps regulate the heartbeat. It is used when a person’s heart beats too slowly or irregularly. The pacemaker is placed inside the body, usually near the heart, and sends electrical signals to stimulate the heart to beat at a normal rate. This helps ensure that blood is pumped around the body effectively. It is especially important for people with heart problems that affect the rhythm of their heartbeat. In GCSE Biology, you may study how pacemakers work and why they are important for maintaining a healthy circulatory system.
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