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 ?
Via retrosigmoid keyhole approach, the following anatomic structures can be exposed: trigeminal nerve, facial nerve, acoustic nerve, posterior cranial nerve, lateral and anterior lateral pons, lateral cerebellar hemisphere, vertebral artery, posterior inferior cerebellar artery.
The left vertebral angiography in the anteroposterior (g) and lateral (h) projection shows left AICA hypoplasia and left posterior inferior cerebellar artery (PICA) aplasia.
The right posterior inferior cerebellar artery (PICA) is not well seen (arrow in (b) indicates the normal left PICA) and may be compressed by surrounding hemorrhage, involved with vasospasm or thrombosed.
Laceration of the posterior inferior cerebellar artery by suboccipital puncture of the cisterna magna: Case report.
Though no apparent cause may be found in some cases, the most common finding is a focal compression of the root exit zone of the facial nerve by an aberrant, atherosclerotic or ectatic vessel, commonly the posterior inferior cerebellar artery or anterior inferior cerebellar artery, or a combination of anterior inferior cerebellar artery and posterior inferior cerbellar artery, or the 20 vertebral artery .
Cervical and cerebral angiography showed the left vertebral artery thrombosed at 2 cm from its origin (Fig 3) and mild diffuse spasm of the right vertebral artery, with reflux into the left vertebral artery up to the C5 level, covering the posterior inferior cerebellar artery territory.
The admission CT was significant, with multiple bilateral cerebellar infarctions in the distribution of the anterior inferior cerebellar artery (AICA), and possibly the posterior inferior cerebellar arteries (PICA).
sup][11] In the initial operation, due to the distance of the posterior inferior cerebellar artery (PICA), a small amount of dissection just distal to the PICA was left.
Lateral medullary syndrome (LMS), first described in 1808 by Gaspard vieussux1, is a well recognized clinical condition due to involvement of vertebral/posterior inferior cerebellar artery.
This compression can be caused by vascular loops that may involve the posterior inferior cerebellar artery, the anterior inferior cerebellar artery, and the vertebral artery.
An angiogram was performed which revealed mild stenosis of the left ICA at the PCOM junction with poststenotic dilation and moderate stenosis of the right ICA at the PCOM junction with both poststenotic dilation and irregular dilation of the right vertebral artery just distal to the posterior inferior cerebellar artery.