joint structure of capillaries veins and arteries
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The average man has approximately six litres of blood in his body. This blood is carried by several different types of blood vessels, each of which are specialised to play their role in circulating blood around the body.
There are three major types of vessels; arteries, veins and capillaries. Arteries (with the exception of the pulmonary artery) deliver oxygenated blood to the tissues. At the tissues, the oxygen and nutrient exchange is carried out by the capillaries. The capillaries also return deoxygenated blood to the veins, which bring it back to the heart (with the exception of the pulmonary veins).
By TeachMeSeries Ltd (2019)

Fig 1.0 – Overview of the vessels involved in blood circulation.
In this article, we shall follow the path that blood takes around the body, examining the structure and function of the major types of blood vessels.
Vessel walls can largely be split into three sections; tunica intima (innermost), tunica media, and tunica adventitia. Each must be considered.
The Arterial System
As a whole, the arterial system takes oxygenated blood from the heart, and delivers it to the capillaries, where oxygen and nutrient exchange can occur.
There are four main types of artery in the body, each with a distinct structure and function.
There are three major types of vessels; arteries, veins and capillaries. Arteries (with the exception of the pulmonary artery) deliver oxygenated blood to the tissues. At the tissues, the oxygen and nutrient exchange is carried out by the capillaries. The capillaries also return deoxygenated blood to the veins, which bring it back to the heart (with the exception of the pulmonary veins).
By TeachMeSeries Ltd (2019)

Fig 1.0 – Overview of the vessels involved in blood circulation.
In this article, we shall follow the path that blood takes around the body, examining the structure and function of the major types of blood vessels.
Vessel walls can largely be split into three sections; tunica intima (innermost), tunica media, and tunica adventitia. Each must be considered.
The Arterial System
As a whole, the arterial system takes oxygenated blood from the heart, and delivers it to the capillaries, where oxygen and nutrient exchange can occur.
There are four main types of artery in the body, each with a distinct structure and function.
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