Where is oxygenated blood

Four valves regulate and support the flow of blood through and out of the heart. The blood can only flow one way—like a car that must always be kept in drive. Each valve is formed by a group of folds, or cusps, that open and close as the heart contracts and dilates.

There are two atrioventricular AV valves, located between the atrium and the ventricle on either side of the heart: The tricuspid valve on the right has three cusps, the mitral valve on the left has two. The other two valves regulate blood flow out of the heart. The aortic valve manages blood flow from the left ventricle into the aorta.

The pulmonary valve manages blood flow out of the right ventricle through the pulmonary trunk into the pulmonary arteries. The muscular wall of the heart powers contraction and dilation. Each contraction and relaxation is a heartbeat. Ventricular contractions, called systole , force blood out of the heart through the pulmonary and aortic valves. Diastole occurs when blood flows from the atria to fill the ventricles. Download Heart Lab Manual. See more from our free eBook library.

The Body Online. A description of the heart from the edition of Gray's Anatomy of the Human Body. Bleeding may be minor or it may be a life-threatening medical emergency.

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The State of Victoria and the Department of Health shall not bear any liability for reliance by any user on the materials contained on this website. Skip to main content. Home Heart. Heart explained. Actions for this page Listen Print. Summary Read the full fact sheet. On this page. The four chambers of the heart The heartbeat Blood vessels of the heart Heart disorders Symptoms of heart disease Where to get help.

The four chambers of the heart Your heart has a right and left side separated by a wall called the septum. The heartbeat Each atrium is connected to its ventricle by a one-way valve. Blood vessels of the heart The blood vessels of the heart include: venae cavae — deoxygenated blood is delivered to the right atrium by these two veins. One superior vena cava carries blood from the head and upper torso, while the other inferior vena cava carries blood from the lower body pulmonary arteries — deoxygenated blood is pumped by the right ventricle into the pulmonary arteries that link to the lungs pulmonary veins — the pulmonary veins return oxygenated blood from the lungs to the left atrium of the heart aorta — this is the largest artery of the body, and it runs the length of the trunk.

Oxygenated blood is pumped into the aorta from the left ventricle. The aorta subdivides into various branches that deliver blood to the upper body, trunk and lower body coronary arteries — like any other organ or tissue, the heart needs oxygen. The coronary arteries that supply the heart are connected directly to the aorta, which carries a rich supply of oxygenated blood coronary veins — deoxygenated blood from heart muscle is 'dumped' by coronary veins directly into the right atrium.

Heart disorders Some disorders of the heart include: coronary heart disease — fatty deposits or plaques build up inside one or more of the coronary arteries atherosclerosis. The process of moving blood through the body is called circulation. Together, the heart and vessels make up the cardiovascular system.

The heart has four chambers two atria and two ventricles. There is a wall septum between the two atria and another wall between the two ventricles. Arteries and veins go into and out of the heart. Arteries carry blood away from the heart and veins carry blood to the heart. The flow of blood through the vessels and chambers of the heart is controlled by valves.

The heart pumps blood to all parts of the body. Blood provides oxygen and nutrients to the body and removes carbon dioxide and wastes.