The difference between veins and arteries

From the outside we can hardly see the veins and arteries in our body, but in fact veins and arteries are distributed in various parts of our body, and veins and arteries have their own different functions and their own ways of operating. Many people cannot tell the difference between veins and arteries. In fact, the method of distinguishing them is very simple. When we touch a blood vessel and feel a beating feeling like a pulse, it is an artery. When we have a blood test, what we draw is venous blood.

Difference Between Veins and Arteries

Difference 1

Arteries have great elasticity and contractility, and their blood dynamics are very strong. The walls of the arteries expand when the ventricles eject blood, and contract when the ventricles relax, prompting the blood to continue flowing forward. It is dangerous if disconnected.

The walls of veins are thin, with fewer smooth muscles and elastic fibers, lack of contractility and elasticity, and a flat cross-section of the lumen.

Difference 2

High oxygen levels in arteries.

The oxygen content in the veins is low, and the air reaches the lungs, combines with the red blood cells in the blood in the alveoli, and reaches various parts of the body through the arteries to provide cell growth. The oxygen molecules are gone, and the blood enters the veins through the capillaries and flows back to the lungs. On to the next cycle. Arteries are blood vessels that carry blood away from the heart. After leaving the ventricles, they branch repeatedly, becoming thinner and thinner, and finally migrate to capillaries. Veins begin at the capillaries and end at the atria. Small veins originate from capillaries and gradually merge into medium veins and large veins during the process of returning to the heart, and finally flow into the atria. ?

Difference Three

What are their functions: Arteries are needed to transport nutrients and oxygen; veins are needed to transport metabolic products and carbon dioxide; and water is needed for the metabolic process.

About Veins

1. Veins are generally distributed in superficial parts of the body, such as the elbows, backs of hands, thighs and soles of feet. They are very easy to see and are bluish purple in color. The blood flowing in the veins is venous blood, which appears dark in color because it contains more carbon dioxide and other metabolic products.

2. When doing blood tests, blood is usually drawn from the elbow vein, so the blood you see is often dark red or black red, which also indicates that your blood contains more red blood cells and hemoglobin. In addition, when the blood is concentrated or in patients with cor pulmonale, the venous blood may appear dark purple.

3. When blood is drawn from fingertips and other peripheral parts, it is possible to see that the blood is darker in color, similar to venous blood. This is because it mostly comes from one end of the peripheral vein, or has a higher hemoglobin concentration, or is caused by factors such as blood concentration.