Arteries are blood vessels that constitute one of the key elements of our circulatory system. Their function is to transport oxygenated blood from the heart to the various organs of the body, allowing them to function optimally. However, there is an exception to this rule, namely the pulmonary arteries, which carry oxygen-poor blood from the vital organs to the lungs for re-oxygenation.

It should be noted that the arteries are high-pressure vessels, which allows them to distribute blood efficiently throughout the body. To do this, they are surrounded by muscle fibers that allow them to contract or relax according to the nervous and hormonal signals they receive. In this way, the arteries can adapt to the body's needs and ensure optimal blood flow in all circumstances.

There are two types of arteries: the pulmonary arteries and the systemic arteries. The pulmonary arteries, as mentioned earlier, carry oxygen-poor blood to the lungs for oxygenation. The systemic arteries, on the other hand, carry oxygen-rich blood to the body's cells to nourish them. These two types of arteries are therefore complementary and allow optimal blood circulation throughout the body.

Arteries are blood vessels that are crucial for the proper functioning of our body. They distribute oxygenated blood from the heart to the organs, while adapting to the body's needs thanks to their ability to contract and relax. The pulmonary and systemic arteries thus ensure efficient and optimal blood circulation throughout the body, thus contributing to our health and well-being.


Definition and Meaning

Arteries are blood vessels that carry oxygen-rich blood from the heart to the body's tissues and organs. They are essential for blood flow in the body, as they provide oxygen and nutrients to the body's cells. Arteries have elastic muscle walls that allow them to contract and expand to adjust blood flow to the body's needs. Arteries are also responsible for maintaining proper blood pressure to ensure normal blood flow in the body. Diseases that affect the arteries, such as atherosclerosis and high blood pressure, can lead to serious complications, including heart disease, stroke and peripheral vascular disease.

Anatomy of the arteries

Arteries are surrounded by smooth muscle fibers that can contract or relax based on nerve and hormonal signals received. This property allows the arteries to adapt to large variations in blood pressure generated by the heart.


Types of arteries

There are two types of arteries: pulmonary arteries and systemic arteries. 

  • The pulmonary arteries come from the pulmonary trunk, which originates from the right ventricle of the heart. They carry oxygen-poor blood, which will join the pulmonary microcirculation to oxygenate itself as it passes around the pulmonary alveoli.
  • The systemic arteries are those that bring oxygen-rich (and nutrient-rich) blood to the cells to ensure their survival.

In summary

Arteries are essential blood vessels that carry oxygenated blood and nutrients to the organs and tissues of the body. The pulmonary and systemic arteries have distinct functions, but both are vital to the overall health of the body.