Human heart parts of hear and function.pdf

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2. MALIHA MUBASHAR ROOMAN FATIMA MALIKA SAEED

4. O
What is heart
Structure of heart
Cardiac cycle
Contraction of heart

5. Heart is a powerful muscular pumping organ which pumps blood
from heart to body via circulatory system.
It move blood through the body .

8. Protective sac of connective Tissue

Surrounds of the heart

Filled with fluid

9. Heart is composed of three types of
tissues.
1.Epicardium

The outer protective covering is called epicardium
Myocardium 2
Most of the human heart is composed of cardiac muscle.

10. 3
Endocardium
Endocardium forms the inside of the heart. It composed of
connective
Tissue and endothelium

11. The heartbeat is a sequence of muscle contraction and relaxation is called Cardiac
Cycle
1.Sinoatrial node ( SA Node)


Atrioventricular node (AV Node) 2.
Purkinje Fibers
3.

12. There are two phase of heart cycle .
Systole;
The phase of contraction of heart
Diastole;
The phase of relaxation of heart