About This Lesson
The blood is carried to different parts of the body through tubular blood vessels .the blood vessels are of three kinds arteries,veins,and capillaries.An artery vessel which carries the blood away from the heart to other parts of the body.it has thick elastic elastic and muscular walls and the blood in it flows with jerks
A vein is a vessel which takes the blood from an organ towards the heart .it has thin muscular walls and the blood in it flows smoothly.
capillaries are the terminal branches of a artery ,which rejoin to form a vein a capillary is a very narrow tube whose wall have a single layer of cells with no muscles
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