the anatomy of the heart

ANATOMY OF THE HEART


THE HEART
- THE HEART IS A CHAMBERED MUSCULAR ORGAN THAT PUMPS BLOOD
RECEIVED FROM THE VEINS INTO THE ARTERIES , THERY BY MAINTAINING
THE FLOW OF BLOOD THROUGH TH ENTIRE CIRCULATORY SYSTEM
- THE HEART IS SUTTOUNDED BY MEMBRANE CALLED PERICARDIUM .


THE PERICARDIUM


-THE PERICARDIUM IS A FIBROSEROUS SAC THAT ENCLOSES THE HEART AND THE
ROOTS OF THE GREAT VESSELS .


-THE PERICARDIUM LIES WITHIN THE MIDDLE MEDIASTINUM


-ITS FUNCTION IS TO RESTRICT EXCESSIVE MOVEMENTS OF THE HEART AS A
WHOLE AND TO SERVE AS A LUBRICATED CONTAINER IN WHICH THE DIFFERENT
PARTS OF THE HEART CAN CONTRACT


PERICARDIUM
A DOUBLE WALLED SAC AROUND THE HEART COMPOSED OF :


SUPERFICIAL FIBROUS PERICARDIUM
- A DEEP TWO LAYER SEROUS PERICARDIUM
- A THE PARIETAL LAYER LINES
- THE INTERNAL SURFACE OF FIBROUS PERICARDIUM

, B.THE VISCERAL LAYER LAYER OR EPICARDIUM LINES THE SURFACE OF THE
HEART
THEY ARE SEPARATED BY THE FLUID – FILLED PERICARDIAL CAVITY




BLOOD SUPPLY
THE PERICARDIUM BLOOD SUPPLY IS FROM THE PERICARDIACOPHRENIC
BRANCHES OF THE THORACIC ARTERIES


NERVE SUPPLY
THE PERICARDIUM NERVE SUPPLY THE FIBROUS PERICARDIUM AND THE
PARIETAL LAYER OF SEROUS PERICARDIUM ARE SUPPLIED BY PHRENIC NERVE.


THE HEART WALL
EPICARDIUM – VICERAL LAYER OF THE SEROUS PERICARDIUM