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SREENARAYANA TRAINING 
COLLEGE 
SREEKANDESWARAM
SUBMITTED TO 
SOYA P 
SUBMITTED BY 
SARANYA .S.S 
NATURAL SCIENCE 
REG: NO: 13383015 
SUBMITTED ON 
20-09-2014
STRUCTURE 
OF 
HEART
INTRODUCTION 
THE HEART IS A 
VITAL MUSCULARORGAN IN 
HUMANS AND MANY OTHER 
ANIMALS, WHICH FUNCTIONS TO 
PUMPBLOOD AROUND...
The Heart 
• Heart – typically weighs 
250–350 grams (healthy 
heart) 
• A muscular double pump 
• Pulmonary circuit – tak...
Structure of the Heart 
• Right and left atria - Superior chambers, receive blood from the 
pulmonary and systemic circuit...
Chambers 
• Left atrium 
• Makes up heart’s posterior 
surface 
• Receives oxygen-rich blood 
from lungs 
• Opens into the...
Heart Valves – Valve Structure 
• Each valve composed of - 
endocardium with 
connective tissue core 
• Atrioventricular (...
Function of the Atrioventricular Valves 
Figure 18.9a
Structure of the Heart – Coverings 
• Pericardium – two primary layers 
• Fibrous pericardium - strong layer of dense conn...
Blood Flow Through the Heart 
Figure 18.6 
• Beginning with oxygen-poor blood in the 
superior and inferior venae cavae 
•...
THANKS
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  1. 1. SREENARAYANA TRAINING COLLEGE SREEKANDESWARAM
  2. 2. SUBMITTED TO SOYA P SUBMITTED BY SARANYA .S.S NATURAL SCIENCE REG: NO: 13383015 SUBMITTED ON 20-09-2014
  3. 3. STRUCTURE OF HEART
  4. 4. INTRODUCTION THE HEART IS A VITAL MUSCULARORGAN IN HUMANS AND MANY OTHER ANIMALS, WHICH FUNCTIONS TO PUMPBLOOD AROUND THE BODY THROUGH THE BLOOD VESSELS OF THECIRCULATORY SYSTEM.[
  5. 5. The Heart • Heart – typically weighs 250–350 grams (healthy heart) • A muscular double pump • Pulmonary circuit – takes blood to and from the lungs • Systemic circuit – vessels transport blood to and from body tissues
  6. 6. Structure of the Heart • Right and left atria - Superior chambers, receive blood from the pulmonary and systemic circuits • Right and left ventricles - Inferior chambers, the pumping chambers of the heart • External markings • Left/right auricles • Apex • Internal Structures • Interventricular septa • Fossa ovalis
  7. 7. Chambers • Left atrium • Makes up heart’s posterior surface • Receives oxygen-rich blood from lungs • Opens into the left ventricle through the Mitral valve (left atrioventricular valve) • Left Ventricle • Forms apex of the heart • Internal walls of left ventricle • Trabeculae carneae • Papillary muscles • Chordae tendineae • Pumps blood through systemic circuit via the Aortic semilunar valve (aortic valve)
  8. 8. Heart Valves – Valve Structure • Each valve composed of - endocardium with connective tissue core • Atrioventricular (AV) valves between atria and ventricles • Aortic and pulmonary valves at junction of ventricles and great arteries
  9. 9. Function of the Atrioventricular Valves Figure 18.9a
  10. 10. Structure of the Heart – Coverings • Pericardium – two primary layers • Fibrous pericardium - strong layer of dense connective tissue • Serous pericardium -formed from two layers • Parietal pericardium • Visceral pericardium • Pericardial cavity
  11. 11. Blood Flow Through the Heart Figure 18.6 • Beginning with oxygen-poor blood in the superior and inferior venae cavae • Go through pulmonary and systemic circuits • A blood drop passes through all structures sequentially
  12. 12. THANKS
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