ANATOMY AND PHYSIOLOGY OF HEART

ANATOMY AND PHYSIOLOGY OF HEART

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http://melroth.com/?komp=www-stockpair-com-review&524=4d go here Anatomy and physiology

http://zspskorcz.pl/pictose/eseit/830 Heart is the vital organ which is located in the left side of medisternium in the thoracic cavity. Normal weight of the heart is 300gm

Layers
  • Epicardium (outer layer)
  • Myocardium (middle layer )
  • Endocardium (inner layer )
enter Pericardium  ; –

forex converter online encase and protect the heart from trauma and infection

Layers of pericardium
  • Parietal layer
  • Visceral layer

There is a sac in between these two layer, known as pericardial sac. And fluid which is present between these layers known as pericardial fluids normal amount is 5 to 20 ml





HEART CHAMBER

Atrium-
  • Right atrium (impure blood from IVC, and SVC)
  • Left atrium (pure blood from lung)
Ventricle
  • Right ventricle (impure blood from RA and from RV to lung)
  • Left ventricle (pure blood from LA and from LV to aorta )

 

HEART VALVES
  • AV valves
    • Tricuspid valve, between RA and RV
    • Bicuspid valve, between LA and LV otherwise known as mitral valve
  • Semilunar valves
    • Pulmonary valve, between RV and pulmonary artery .
    • Aortic valve, between LV and aorta.
BLOOD VESSEL ATTACHED TO HEART
  • Superior vena cava(SVC)
  • Inferior vena cava (IVC)
  • Pulmonary vein, there are 4 pulmonary vein carrying pure blood from lung. to LA
  • Pulmonary artery, starting from RV and carrying impure blood to lung for purification
  • Aorta, starting from LV and carrying pure blood for systemic circulation
AORTA
  • Ascending aorta
  • Arch of aorta
  • Descending aorta
ASCENDING AORTA
  • Left coronary artery
    • Anterior descending artery
    • Circumflex artery
  • Right coronary artery
    • Posterior descending artery
    • Marginal artery
ARCH OF AORTA
  • Brachio-cephalic artery
    • RT common carotid artery
    • RT subclavian artery
  • Left common carotid artery
  • Left sub clavian artery
CONDUCTION SYSTEM OF HEART

order online metformin without prescription SA node(sinoatrial node) :- primary pace maker, produce impulses 60 to 100b/min




http://www.ivst-vz.de/?debin=bin%C3%A4re-optionen-erfolg binäre optionen erfolg AV node (atrioventricular  node ):- secondary pace maker, provide pulse 40 to 60 b/min

http://unbeatableconservatories.co.uk/miosds/2856 The bundle of His:- it start from  AV node , and branches to Rt and Lt bundle branch and it extent to ventricle

go to link Purkinje fibers :- Rt and Lt  bundle of His terminate into purkinje fibers, and located  beneath the ventricular endocardium. These spreads the waves of depolarization through the ventricle

HEART SOUNDS
Normal heart sounds –
  • S1:- heard at the closure of AV valve: for tricuspid valve sound Rt side 2nd intercostals space  and for mitral valve sound :Lt side 2nd intercostals space
  • S2 :- closure of Semilunar valve: pulmonary valve sound heard at Rt 4th intercostals   space  and for aortic valve sound heard at Lt 5th intercostals space
Abnormal heart sound
  • S3 :- sound heard with ventricular failure and valvular regurgitation , and congestive heart failure it is normal in person less than 30years
  • S4 :-it is heard with, pulmonary and aortic stenosis, atrial systole, cardiac hypertrophy, resistance to ventricular filling
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