Human heart is located between the lungs in the thoracic cavity. The heart is a hollow, fibromuscular organ of somewhat coni or pyramidai form ith upper broad part, the base and lower narrow, the apex. The apex is slightly directed to the left Heart has two protective layer (covering) consisting of outer parietal pericardium and inner visceral pericardium attacheo layers, a space, the pericardial cavity is present which is filled with a pericardial fluid. The to the heart. In between the two layers, à space, the pericardial ca protects the heart from shocks and mechanical injuries and also allows free movements of the heart
Superior Vena Cava- Carries blood from body's upper region to night Aorta-me main artery frcr7 whにh al other arteries arise ard run through differen: body
Opening of superior vena cava
Pulmonary Artery-
Carries decxygenated blood from RV tc lungs SA Node-Pacemaker cf the heart, which spreads waves of contraction Pulmonary Vein- Carrie oxycenated blocd from across walls of arria Right Atrium- Receves opening of superior vena cavainferior vena cava and oronarynsinusungs to lett atrium Left Atrium- Receves oxigenated blood from
Opening of inferion vena cava guarded by Mitral or Bicuspid Vķalve- Allows the blocd Eustachian valva move from the left atrium to left ventricle Pulmonary Semilunar Valve- Allows unidirectional flow of deoxygenated blood from right ventricie to pulmonary artery Aortic Semilunar Valv เป lowes unidirectic nal flo
of oxygenated blaod fronm left ventricle to aorta AV Node- Pacesetter of
the heart Bundle of His- Mass of specialised fibres criginates from AV nodej Tricuspid Valve- Alows blood to move from right atrium to right ventricle Left Ventricle Pumps oxygenated blacd to different bady tissues. It is the thickest portion of tmhuman heart Right Ventricle- Receives deoxygenated blood frorm RA and pumps it to lungslfor oxygenation Purkinje Fibres- Network of fine fibres formed by division of Bundle of His Bundie o His and Purcinje fitre canvey impulse of contraction from AV node to Inferior Vena Cava- Carries
biood from body's lower region to the
heart.
