The heart

The heart is a hollow organ made up of cardiac muscle tissue which lies in the thorax above the diaphragm and between the lungs.

Branches of ascending aorta

Superior vena cava

Right pulmonary artery to right lung

Right atrium

Right pulmonary veins from right lung

Tricuspid valve Right ventricle Inferior vena cava

Fig 5.8 The structure of the heart

Branches of ascending aorta

Superior vena cava

Right pulmonary artery to right lung

Right atrium

Right pulmonary veins from right lung

Tricuspid valve Right ventricle Inferior vena cava

Branch of pulmonary artery

Left pulmonary artery to left lung

Left pulmonary veins from left lung

Left atrium

Bicuspid valve

Left ventricle

Descending aorta

Arch of aorta

Branch of pulmonary artery

Left pulmonary artery to left lung

Left pulmonary veins from left lung

Left atrium

Bicuspid valve

Left ventricle

Descending aorta

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