PPT On The Heart

Presentation On The Heart

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The Heart Presentation Transcript:
1.The Heart

2.OBJECTIVES
ANATOMY
SHAPE
POSITION
STRUCTURE
PHYSIOLOGY
FLOW OF BLOOD THROUGH THE HEART
BLOOD SUPPLY TO THE HEART
CONDUCTING SYSTEM OF THE HEART
CARDIAC OUTPUT

3.THE HEART
SHAPE
ROUGHLY CONE SHAPED
10CM LONG
SIZE OF THE OWNER’S FIST
WEIGHS ABOUT 225g IN WOMEN AND ABOUT 310g IN MEN

4.POSITION OF THE HEART

5.POSITION OF THE HEART
HEART LIES
IN THORACIC CAVITY IN MEDIASTINUM( i.e BETWEEN LUNGS)
OBLIQUELY, A LITTLE MORE LEFT TO LEFT THAN RIGHT
PRESENTS A BASE ABOVE AND APEX BELOW

6.ORGANS ASSOCIATED WITH THE HEART
INFERIORLY- DIAPHRAGM
SUPERIORLY- GREATER BLOOD VESSELS
LATERALLY- LUNGS
ANTERIORLY- STERNUM

7.STRUCTURE OF THE HEART
The heart wall
It is composed of three layers of tissue
PERICARDIUM
MYOCARDIUM
ENDOCARDIUM

8.PERICARDIUM
IT IS THE OUTERMOST LAYER, IT IS MADE UP OF 2 SACS
OUTER SAC- FIBROUS TISSUE, IT IS ADHERENT TO DIAPHRAGM( prevents overdistension of heart)
INNER SAC- SEROUS MEMBRANE(SM)
OUTER LAYER OF SM- PARIETAL PERICARDIUM
INNER LAYER OF SM-VISCERAL PERICARDIUM

9.MYOCARDIUM
COMPOSED OF CARDIAC MUSCLE
EACH FIBRE(CELL) HAS NUCLEUS AND ONE OR MORE BRANCHES
END OF CELL AND THEIR BRANCHES ARE IN CLOSE CONTACT- THESE JOINTS ARE CALLED AS INTERCALATED DISCS

10.ENDOCARDIUM
CONSISTS OF CHAMBERS AND VALVES OF THE HEART
THIN, SMOOTH, GLISTENING MEMBRANE
CONSISTS OF FLATTENED EPITHELIAL CELLS AND CONTINUOUS WITH ENDOTHELIAL LINING THE BLOOD VESSELS
PERMITS SMOOTH FLOW OF BLOOD INSIDE HEART

11.FORMATION OF PERICARDIUM AROUND HEART

12.Layers of pericardium and heart wall

13.INTERIOR OF THE HEART

14.CHAMBERS OF THE HEART
DIVIDED INTO LEFT SIDE AND RIGHT SIDE BY SEPTUM

15.CHAMBERS OF THE HEART sides are labeled in reference to the patient facing you
Two atria
Right atrium
Left atrium
Two ventricles
Right ventricle
Left ventricle