The pulmonary circuit moves deoxygenated blood to the lungs for oxygenation and then returns oxygen-rich blood to the heart. Carbon dioxide is released, and oxygen binds to hemoglobin.
Arteries, Arterioles, Capillaries: How Branching Delivers Blood and Nutrients
Core Components and Function At the center of the system is the heart, a muscular pump that rhythmically contracts to propel blood. The sinoatrial node acts as a natural pacemaker, setting the rhythm.
The systemic circuit transports oxygenated blood from the heart to the rest of the body and returns deoxygenated blood back to the heart. Veins contain valves that prevent backflow and rely on muscle contractions to return blood to the heart.
Arteries Arterioles and Capillaries: How Branches Form and Function
Nutrients and oxygen diffuse into tissues. Blood, the circulating fluid, carries oxygen, hormones, and immune cells throughout the body.
More About Basics of cardiovascular system
Looking at Basics of cardiovascular system from another angle can help expand the discussion and give readers a second clear paragraph under the same section.
More perspective on Basics of cardiovascular system can make the topic easier to follow by connecting earlier points with a few simple takeaways.
