Functions of human heart

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1. FUNCTIONS OF HUMAN HEART A Presentation by Ashritha s

2. Human heart

3. Table of contents Structure of the Heart Heart Chambers Valves Function of Heart Circulation of Blood Contraction of Heart Conduction system of the Heart

4. MR. HEART A hollow, pump like organ of blood circulation, composed mainly of rhythmically contractile smooth muscle, located in the chest between the lungs and slightly to the left and consisting of four chambers. When 140 bpm, you're having a baby   girl . Below 140 bpm, you're carrying a  boy . When under pregnancy, can detect baby by those heart beat rate. It’s Pure white in color. Weight is abt 280-340 g in males and 230-280 g in females.

5. Length 12 cm Width 8.5 cm Thickness 6 cm According to Gray's Anatomy, the heart length, width, and thickness is……

6. EJECTION FRACTION HEART'S PUMPING ABILITY Normal 50-75 % Below Normal 36-49 % Low 35% and below Ejection Fraction of the Heart

7. pure color of the human heart after removing without leaving a single blood cells…

8. Location Is located in the Thoracic cavity Posterior to the Sternum Superior to the Diaphragm Between the Lungs The Tip of the Heart is called “Apex”

9. Anatomy 4 layers Endo-cardium Myo-cardium Epi-cardium Peri-cardium 4 chambers 2 atrium 2 ventricles 4 valves Mitral Aortic Tricuspid Pulmonary

10. The Heart consists of Four Cell Layers: The Endo Cardium (Inner layer of the Heart) is formed by Endothelial cells , and it lines in the Interior of the Heart chambers and Valves. The Myo Cardium (Heart Muscles) is the muscular middle layer of the Heart that consists of Heart muscle Cells

11. The Epi- Cardium (Outer layer of the Heart )is formed by Epithelial cells , and forms the outer cell layer of the Heart The Peri- Cardium (surrounding the Heart)is a membranous sac that surrounds the Heart. It consists of two layers: The Visceral pericardium(adheres to the epi- cardium) Parietal pericardium (outer coat) Pericardial cavity(space between those two layers & it also contains Peri- cardial fluid

12. Four layers of Human Heart

13. Endo-cardium Myo-cardium

14. Structure of the heart It is divided into the Left and Right side by partitions called septa (Singular septum) Interatrial septum separates the two Upper chambers , called Atria Interventricular septum separates the two Lower chambers, called Ventricles

15. CHAMBERS OF THE HEART The heart is divided into Four chambers: A: Right Atrium V: Right Ventricle A: Left Atrium V: Left Ventricle

16. Heart Chambers The Human Heart has Four chambers , which are responsible for pumping blood and maintaining blood circulation throughout the body. The four chambers are : Blood is only pumped to one direction. Four Heart Valves ensure that blood does not flow backward within the Heart

17. Valves of the Heart Valves are located within the chambers of the Heart Function of the Valves: Controls the direction of blood flow Allows one way flow of blood -through chambers -From the Heart to the body

18. The Four valves are known as: The tricuspid valve The pulmonic (or) Pulmonary valve The Mitral valve The Aortic valve

19. Functions of Heart

20. Heart functions to circulate blood around the body .The right and left side of the Heart pump blood into two different circulations. Right side pumps deoxygenated (without oxygen)blood into pulmonary circulation, while the left side pumps oxygenated blood into systematic circulation. Blood enters the right atrium, which pumps the blood into the right ventricle. The tricuspid valve prevents blood from flowing backward into right atrium. The right ventricle pumps the blood into the pulmonary artery by the way through pulmonary valve

21. pulmonary artery will deliver the deoxygenated blood to the lungs , where gas exchange occurs Oxygen is taken from the air into the blood (oxygenated blood) while carbon-dioxide is expelled from the blood into the air . The oxygenated blood returns to the left side of the Heart by the way through the pulmonary veins The oxygenated blood enters the left atrium. The left atrium pumps blood into the left ventricle . The mitral valve prevents blood from flowing backward into the left atrium . The left ventricle pumps the blood into the aorta & systemic circulation . The oxygenated blood is delivered everywhere in the body (besides the lungs )

22. Blood circulation Blood circulates around the body by the way through two distinct pathways; The pulmonary circulation The systemic circulation Together they create a closed pathways that keep the deoxygenated & oxygenated blood separated.

23. Contraction of the Heart The contraction of the muscular wall of the heart chambers, Myo- cardium generates the force to pump blood. The Heart contraction is divided into two phases : Systole (contraction) & Diastole (Relaxation) Blood is pumped from the chambers during a contraction phase. Heart chambers are filled with blood during a relaxation phase.

24. Outer posterior of the Heart

25. Interior structure of the Heart

26. Simple format of the Human Heart……

27. Thank you…