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 ?
Isolated posterior spinal artery aneurysm causing intracranial acute subarachnoidal hemorrhage.
Subarachnoid hemorrhage following posterior spinal artery aneurysm.
As he was holding the exhibit, I noticed that he was moving it ever so gently and slowly, trying to get the air bubble to move to the representation of the anterior spinal artery.
This rare syndrome is caused by hypoperfusion of the anterior spinal artery, leading to ischemia in the anterior two thirds of the spinal cord, and to our knowledge has not been previously reported in patients with BD.
Anterior spinal cord syndrome comprises ischemia or infarction of the spinal cord in the distribution of the anterior spinal artery, which supplies the ventral two-thirds of the spinal cord.
Hematomyelia caused by ruptured intramedullary spinal artery aneurysm associated with extramedullary spinal arteriovenous fistula--case report.
We report an 83-year-old patient who developed anterior spinal artery syndrome resulting in paraplegia some 24 hours after undergoing spinal anaesthesia for a Moore's hemiarthroplasty.
Key Words: spinal anaesthesia, complications, anterior spinal artery syndrome, paraplegia
A spinal artery was identified in three patients, one spinal artery originated from the left bronchial artery, one from the right intercostal artery, and one from the right subclavian artery.
7%), artery spasm and closure occurred in six patients, arterial subintimal dissection occurred in one patient, and the responsible vessel couldn't be super-selective in one patient because of combining with the spinal artery.