Cardiovascular System
What You’ll Learn
The heart is a muscular, four-chambered organ that pumps blood through the body's circulatory system. The right side of the heart receives deoxygenated blood from the body and pumps it to the lungs, while the left side receives oxygenated blood from the lungs and pumps it out to the body. The heart's contractions are controlled by an electrical conduction system, with the sinoatrial (SA) node acting as the heart's natural pacemaker. Disruptions to the heart's structure or function can lead to various cardiovascular diseases, highlighting the importance of maintaining a healthy heart