Circulatory System

1.Organ of Circulatory System

organs of Circulatotry System

Our circulation system consist of two main parts, namely blood vessel and heart.

a.Blood Vessel

Our blood vessels consist of arteries oand veins.The blood vessels branch into smaller vessels called capillaries.At the tip of the capillaries,arteries and veins join.Therefore, our blood vessel is a closed blood vessel.

1.Artery

Artery is a blood vessel transporting blood from heart throughout the body.The biggest artery is the one closest th the heart called aorta.Aorta branches into artery.Artery still branches into smaller artery called arteriole.At the tip of artiole,it is formed many soft branches and it becomes capillary beds called artery capillaries.

2.vein

vein is a blood vessel transporting blood from the body back to he heart.vein is started from vein vein capillaries in tissues.capillaries unite to form a bigger vein which is called vena.some of the veins are the branches of the lungs(pulmonary vein) and the liver(hepatica vein).

Observed Characteristic	Artery	Vein
1.thickness	thicker	thinner
2.Valve	only on particular site	many
3.Location	within the body	outside the body
4.color	red	bluish red

b.Heart

1.Heart Structure

How is the heart anatomy that makes it has the ability as a blood pump? Heart muscle is similiar with skeletal muscle,but it has branch structre(anastomose).Human heart is divided into four chambers,two atrium chambers and two ventricle chambers.Look at the picture.

2.Heart Function

Heart is an organ that never stops working.In a day,about7,500 liters of blood is pumped by heart throughout the body.The heart beat occurs due to the contraction and relaxation of heart muscle

c.Circulatory System

1.Large Circulatory System

in large circulatory system, blood is pumped away from heart through arcus aorta throughout superior and inferior vena cava.Blood that is pumped is oxygeneted (clean) blood from lungs

2.Small Circulatory System

In small circulatory system, blood is pumped out from heart towards lungs through pulmonary arteryThe blood is deoxygenated (dirty) blood, which comes from the body that is carried back to he heart through veins.

ok that is for now next i will make about th Blood system in my next coding