artery

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artery,

blood vessel that conveys blood away from the heartheart,
muscular organ that pumps blood to all parts of the body. The rhythmic beating of the heart is a ceaseless activity, lasting from before birth to the end of life. Anatomy and Function

The human heart is a pear-shaped structure about the size of a fist.
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. Except for the pulmonary artery, which carries deoxygenated blood from the heart to the lungs, arteries carry oxygenated blood from the heart to the tissues. The largest arterial trunk is the aortaaorta
, primary artery of the circulatory system in mammals, delivering oxygenated blood to all other arteries except those of the lungs. The human aorta, c.1 in. (2.54 cm) in diameter, originates at the left ventricle of the heart.
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, branches of which divide and subdivide into ever-smaller tubes, or arterioles, until they terminate as minute capillariescapillary
, microscopic blood vessel, smallest unit of the circulatory system. Capillaries form a network of tiny tubes throughout the body, connecting arterioles (smallest arteries) and venules (smallest veins).
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, the latter connecting with the veinsvein,
blood vessel that returns blood to the heart. Except for the pulmonary vein, which carries oxygenated blood from the lungs to the heart, veins carry deoxygenated blood. The oxygen-depleted blood passes from the capillaries to the venules (small veins).
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 (see circulatory systemcirculatory system,
group of organs that transport blood and the substances it carries to and from all parts of the body. The circulatory system can be considered as composed of two parts: the systemic circulation, which serves the body as a whole except for the lungs, and the
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). Other important arteries are the subclavian and brachial arteries of the shoulder and arm, the carotid arteries that lead to the head, the coronary arteries that nourish the heart itself, and the iliac and femoral arteries of the abdomen and lower extremities. The walls of the large arteries have three layers: a tough elastic outer coat, a layer of muscular tissue, and a smooth, thin inner coat. Arterial walls expand and contract with each heartbeat, pumping blood throughout the body. The pulsating movement of blood, or pulsepulse,
alternate expansion and contraction of artery walls as heart action varies blood volume within the arteries. Artery walls are elastic. Hence they become distended by increased blood volume during systole, or contraction of the heart.
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, may be felt where the large arteries lie near the body surface.

artery

[′ärd·ə·rē]
(anatomy)
A vascular tube that carries blood away from the heart.

artery

any of the tubular thick-walled muscular vessels that convey oxygenated blood from the heart to various parts of the body
References in periodicals archive ?
If the femoral system fails to develop, the sciatic artery becomes the dominant supply to the leg and the superficial femoral artery remains hypoplastic.
When the sciatic artery persists, it is usually a tortuous and enlarged vessel.
Aneurysm formation in the persistent sciatic artery occurs in as many as 46% of cases, and may be the first evidence of the presence of the anomaly, causing buttock pain and sometimes sciatic nerve compression with sciatic pain in the affected leg.3
The high incidence of aneurysm formation is probably related to repeated external trauma as the persistent sciatic artery is in a relatively vulnerable anatomic position.
Conclusion: A persistent sciatic artery is a rare congenital vascular anomaly that can present with various atherosclerotic complications.
The persistent sciatic artery. Eur J Vasc Endovasc Surg 2009; 37: 585-91 Epub 2009 Feb 20.
C) Posterior view three-dimensional reconstruction of the computed tomographic angiogram of the left persistent sciatic artery. It is passing out of the pelvis via the greater sciatic foramen.
Angiography revealed left complete persistent sciatic artery. The left superficial femoral artery (SFA) was hypoplastic, while the left persistent sciatic artery was hyperplastic and terminated in the distal thigh.
Persistent sciatic artery is extremely rare congeni-tal anomaly.
In current study, the deep branch of superior gluteal artery provides the articular branch in 98.6% classifying as a direct branch in 95.2% and indirect branch as arising from the sciatic artery in 3.4%.
In current study, the inferior gluteal artery provides articular branch in 81% classifying into a direct in 78% or indirect branch as arising from the sciatic artery in 3%.