05/06/2026
The heart is more than just a symbol on a Valentine’s card—it’s the engine of the human body! ❤️⚙️
If you are thinking about a career in nursing, understanding the heart and circulation is foundational. You can't understand why a patient's oxygen dropped or blood pressure spiked until you understand how the heart pumps!
Here is a quick breakdown of your heart's two main loops:
🫁 Pulmonary Circulation (The Right Side): Receives oxygen-poor blood from the body and pumps it to the lungs to pick up oxygen.
🩸 Systemic Circulation (The Left Side): The left atrium receives the newly oxygen-rich blood from the lungs, and the left ventricle (the strongest chamber!) pumps it out to the entire body.
⚡ The Electrical System: Your heart doesn't just squeeze randomly! It follows a signal starting in the SA node (the heart's natural pacemaker) that tells the chambers when to contract. Understanding this is the first step to reading EKGs!
🚨 Clinical Tip: Did you know that the heart isn't the only organ involved in circulation? The heart is the pump, but the blood vessels (arteries, veins, capillaries) are the pipes. High blood pressure means your left ventricle is pushing against too much resistance and working harder than it should!
Check out our full Nursing Student Guide on the blog to build your cardiovascular foundation! 👇
https://vervecollege.edu/role-of-heart-in-circulation/