Heart Blood and Circulation

Adequate blood circulation is essential for life. The blood is kept in constant circulation by the pumping action of the heart, which sends blood to the lungs to pick up oxygen, and then pumps it to the rest of the body. The blood is pushed through a system of vessels, which branch repeatedly into increasingly smaller and thinner vessels, bringing life-sustaining blood to cells throughout the body.

Aorta (directs oxygen-rich blood from heart to body)

Superior vena cava (returns blood from upper body to heart)

Right atrium (receives oxygen-depleted blood from superior and inferior venae cavae)

Tricuspid valve (permits blood to flow from right atrium to right ventricle)

Inferior vena cava (delivers blood from lower body to heart)

Pulmonary artery (carries blood from heart to lungs)

Aorta (directs oxygen-rich blood from heart to body)

Mitral valve (permits blood to flow from left atrium to left ventricle)

Right ventricle (pumps blood into pulmonary artery)

Pulmonary valve (controls blood flow out of heart into pulmonary artery)

,,___Pulmonary veins (carry blood from lungs to heart)

11 j-__Left atrium (receives oxygen-rich blood from lungs)

Aortic valve (controls blood flow out of heart into aorta)

Mitral valve (permits blood to flow from left atrium to left ventricle)

Left ventricle (pumps blood into aorta)

Right ventricle (pumps blood into pulmonary artery)

The Heart

The heart is a muscular organ about the size and shape of a fist and consists of two side-by-side pumps.The veins carry used, oxygen-depleted blood to the right side of the heart, which pumps it to the lungs for a fresh supply of oxygen.The oxygenated blood returns to the left side of the heart, which pumps it through the aorta.The aorta directs the fresh blood to a system of arteries, which carry it to tissues throughout the body.The veins return the used, oxygen-depleted blood to the heart, starting the process again.

Common

Health

Concerns

Jugular vein Subclavian vein Superior vena cava Inferior vena cava Hepatic vein Radial artery

Carotid artery Subclavian artery Aorta

Pulmonary artery Heart

Descending aorta Brachial artery

Common iliac artery Femoral artery

The Circulatory System

The circulatory system is a network of blood vessels that branch out from the heart into smaller and smaller channels.The heart and circulatory system work as a single system to transport blood to and from all the cells of the body.

Common iliac vein Femoral vein Great saphenous vein

Carotid artery Subclavian artery Aorta

Pulmonary artery Heart

Descending aorta Brachial artery

Common iliac artery Femoral artery

The Circulatory System

The circulatory system is a network of blood vessels that branch out from the heart into smaller and smaller channels.The heart and circulatory system work as a single system to transport blood to and from all the cells of the body.

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