The Heart and Circulation blood

Heart and Circulation blood

• The heart is a hallow Muscular organ situated at the centre of the Chest cavity, between the lungs on either side.
• It acts a pump. It is divided into four chambers. The right upper chamber.
• It called the right atrium receives impure blood from all parts of the body through blood vessels called veins.
• When the heart beats this impure blood is passed into the right lower chamber.
• Called Right Ventricle, and finally finds its way to the lungs where it is purified.
• During the process of purification, it gives up carbondioxide and takes a fresh quantity of oxygen.
• The blood so purified finds its way into the left upper chamber called left Atrium.
• Then passes to the left lower chamber. called Left Ventricle.
• And from there, in the course of the beating of the heart.
• The purified blood is discharged into various blood vessels called arteries and capillaries.
• Which convey this purified blood for the nourishment of the body as a whole.
• Thus each heart is two pumps put together.
• The pressure in the arteries varies with the beating of the heart.
• When the heart contracts the pressure in the arterial system increases.
• When the heart relaxes. the pressure in the arteries decreases.
• This pressure exerted on the arteries is known as the"Blood Pressure".
• And is recorded by the blood pressure instrument or a rough estimate made by feeling the pulse.

Tags: Heart circulation, Circulation blood, Blood pressure, Pulse feelings