All of the blue-colored blood vessels on a blood flow diagram show passages carrying deoxygenated blood from the heart to the lungs, while all of the red-colored passages show oxygenated blood being circulated throughout... More » Science Human Anatomy Blood

Different cardiac blood flow diagrams can be found on the Healthline, Children's Heart Institute and Austin Community College websites. Each provide a different method of explanation. Healthline allows the user to scroll... More » Science Human Anatomy Blood

According to HowStuffWorks, blood flows into the right side of the heart and out to the body from the left side. During its passage, it passes through all four chambers of the heart. Between passing through the right and... More » Science Human Anatomy Organs
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The human circulatory system, also known as the cardiovascular system, includes the heart, blood vessels and the lungs, according to LiveScience. The circulatory system transports nutrients, oxygen, hormones and other su... More » Science Human Anatomy Blood

Blood that reaches the lungs travels throughout a network of small blood vessels, where oxygen moves into the blood and carbon dioxide moves out of the blood, according to the National Heart, Lung and Blood Institute. Th... More » Science Human Anatomy Blood

The heart is the first organ to receive freshly oxygenated blood from the lungs, explains the National Institute of Health. The heart has two sides. The right side pumps blood to the lungs to pick up oxygen and the left ... More » Science Human Anatomy Blood

Blood enters the heart through two major veins at the right atrium before going to the right ventricle and to the lungs. When blood returns from the lungs, it goes into the left atrium and the left ventricle before leavi... More » Science Human Anatomy Blood