20 Notable Things About The Human Heart

the human heart

1.The human heart has four chambers. Two atria(auricles) and two veins(ventricles).

2.The heart is made up of cardiac muscles

3.The function of the heart is involuntary

4.The heart beat of the human is initiated by sino-atrial node

5.The rate of the heart beat is controlled by the nervous system(MEDULLA)

6.The heart pumps blood to all parts of the body.

7.The heart has the shape of a cone.

8.The interventricular septum divides the heart longitudinally into two sides.

9.The ventricles are thicker and firmer than the auricles.

10.Myogenic hearts are inhibited by the acetylcholine.

11.Contraction of the heart or any chamber is called systole

12.Relaxation of the heart or any chamber is called diastole

13.The vagus parasympathetic nerve slows the rate of the heart beat.

14.The vagus sympathetic nerve accelerate the rate of the heart beat.

15.One heart beat consist of relaxation, contraction and  a pulse.

16.The sino-atrial node is also called the peace maker

17.The heart is protected by a protective sac called  the pericardium

18.The heart is divided into three layers. The epicardium, myocardium and endocardium.

19.A the heart of a born baby beats more than that of an adult.

20.The normal heart beat of an adult per minute is 72 times and 300,00000 times in a life time
Note: the heart has no bone

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