Meaning of Aorta
What is Aorta:
The main artery of the human body is known as aorta, it begins in the left ventricle of the heart, and ends at the level of the fourth lumbar vertebra, where the primitive iliac arteries divide into two branches.
The aorta, is a tube with thick elastic walls, it is the largest artery in the body. It arises from the left ventricle of the heart, arcs upward, backward, and to the left (aortic drop), and then descends behind the thorax, through the diaphragm to reach the abdomen.
Based on the above, several parts of the aorta are distinguished:
- Ascending aorta, is the first portion of the aorta that comprises from the heart, and the beginning of the arch of the aorta, where the left and right coronary arteries originate.
- Descending aorta, arises in the aortic arch to the place where the primitive iliac arteries divide. It is noteworthy that the primitive iliac, contribute especially to the irrigation of the lower abdomen and lower limbs.
- Thoracic aorta, arises a series of arteries that supply the heart, head, neck, and arms.
- Abdominal aorta, other arteries come out that supply the abdominal organs, the pelvis and the legs.
As such, the heart's job is to pump blood throughout the body. The blood of the left ventricle distributes oxygen and nutrients to the whole organism except the lungs, through systematic circulation.
The aorta is a flexible and extensible artery, when the left ventricle of the heart contracts in systole, injecting blood into the aorta, it expands. This process provides energy to maintain blood pressure at the time the aorta shortens, that is, in diastole.