How the Heart Works
How Does ... pulmonary veins (which bring oxygen-rich blood from the lungs to the heart) and the coronary arteries (which supply blood to the heart muscle). On the inside, the heart is a four-chambered, hollow organ. It is divided into the left and right ...
Blood Vessels That Carry Blood Away From the Heart
Ventricles are larger because they have to pump the blood out of the heart into farther-reaching parts of the body, so they have to be more muscular to do ... oxygen is attached to the blood cells. The capillary network then turns into pulmonary veins ...
How the Heart Works - Topic Overview
The heart is at the center of your circulatory system, which is a network of blood vessels that delivers blood to every part of your body. Blood carries ... oxygen-poor blood to the lungs through the pulmonary valve. The left atrium receives oxygen-rich ...
Circulatory System: Facts, Function & Diseases
When it gets to the lungs, carbon dioxide is released from the blood and oxygen is absorbed. The pulmonary vein sends the oxygen-rich blood back to the heart. The systemic circulation ... your ears to hear and your muscles to do the heavy lifting.
How does the cardiovascular system work?
Red blood cells in the heart ... pulmonary veins. From the center, the oxygen-rich blood cells hop on bodily highways, or arteries, to deliver their packages. There are many types of arteries in the human body, but they all serve the same function: to ...