Page 253 - Ultimate Visual Dictionary (DK)

HEAR T
STRUCTURE OF HEART
Left subclavian artery
Brachiocephalic trunk
Left common
carotid artery

Superior vena cava

Ascending aorta Left pulmonary vein

Right pulmonary
artery Pulmonary trunk

Fossa ovalis Pulmonary semilunar valve

Coronary artery

Right pulmonary vein
Chordae
Right atrium tendineae

Opening of
inferior vena cava Muscular part of
interventricular
septum
Branch of coronary artery
Left ventricle

Tricuspid valve
Papillary muscle
Chordae
tendineae
Myocardium of
Right ventricle left ventricle
Trabecula

ATRIAL SYSTOLE (VENTRICULAR DIASTOLE)
VENTRICULAR SYSTOLE
Pulmonary artery
Right atrium Aorta
contracts Left atrium
contracts Pulmonary
valve opens Aortic valve
Tricuspid opens
valve opens Mitral valve Tricuspid
opens valve closes Mitral valve
closes
Right ventricle Right ventricle
dilates Left ventricle contracts Left ventricle
dilates contracts

Left and right atria contract, forcing blood into the Ventricles contract and force blood to the lungs for
relaxed ventricles. oxygenation and via the aorta to the rest of the body.

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