Aorta vs. Pulmonary Arteries

Difference Between Aorta and Pulmonary Arteries

Both the aorta and the pulmonary arteries are significant components of the circulatory system of the body.They execute different functions in the human body and are extremely significant for its survival. There are interesting differences among them and that we explore in the section below.

 · Features

Carrying deoxygenated blood is the first and the most basic difference between the pulmonary arteries & the aorta. As a matter of fact, deoxygenated blood is carried only by the pulmonary arteries. All other arteries carry oxygen-rich blood.

The aorta, on the other hand, carries oxygenated blood to the other parts of the body from the left ventricle.

 · Location

The location of these organs forms the next point of difference between them. The origin of the pulmonary artery is at the bottom of the right ventricle – pulmonary trunk. It then diversified in both lungs on both sides.

The aorta on the other hand, carries oxygenated blood to the various parts of the bodyandarises from the left ventricle. It then descends into the abdomen of branching in two smaller arteries.

 · Divisions

For the purpose of study, the Aorta is usually divided into five main parts. They are:

1. Aorta rising

2. Arch of Aorta

3. Descending Aorta

4. Thoracic Aorta

5. Abdominal Aorta

Arising from the trunk, the pulmonary artery bifurcates into two parties; one entering the right lung and the other forking into the left.

 · Diseases

They both also differ in the nature and types of diseases that afflict them. For example, pulmonary hypertension is the most common disease of the pulmonary arteries. This is the result of obstruction or pressure in both arteries. It also follows the weakening of the right ventricle. This is because it is harder to push blood to move to the lungs.

Other afflictions include congenital conditions such as pulmonary stenosis.

Weakness of the aorta is a direct effect of this disease. This results in dilation of the walls resulting in a further aneurysm. It can even cause a tear and dissection. Hardening of the aortal walls and obstruction at the beginning of the main aortal branch are some other effects. The reasons can be anything ranging frominherent weaknesses to lifestyle factors.



 Oxygenated blood is carried to the various body parts by the aorta. Deoxygenated blood is carried to the lungs by the pulmonary arteries, for cleaning and re-oxygenation.

 · the pulmonary artery arises from right ventricle to the pulmonary trunk. The aorta arises from the left ventricle.

 · the aorta can be divided into five parts as he travels the body. The pulmonary artery has two branches, each respective title to the lungs.

A ° the diseases include hypertension of pulmonary arteries and congenital anomalies such as stenosis. The aorta may be afflicted with hardening of the walls and different types of rupture.


Category: VS  |  Tags: