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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.


A vascular tube that carries blood away from the heart.


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 ?
The Gynecologic Oncology Group (GOG) surgical manual defines para-aortic lymphadenectomy as being in the basin below the inferior mesenteric artery, according to Dr.
Uterine fundal blood supply from an aberrant left ovarian artery originating from the inferior mesenteric artery: implications for uterine artery embolization.
Postoperatively, patient underwent contrast enhanced angiography, which revealed 60%-70% stenosis of proximal superior mesenteric artery and 80-90% thrombotic occlusion of proximal inferior mesenteric artery with complete thrombotic occlusion of left common iliac artery (Figure 2 and Figure 3).
The additional renal artery originated from the abdominal aorta at the level of the third lumbar vertebra lateral to the inferior mesenteric artery. Its length was 4cm to the point it divided into 3 branches.
(3) The collection of paraganglia located anterolaterally to the distal abdominal aorta between the origin of the inferior mesenteric artery and the aortic bifurcation is called the organ of Zuckerkandl.
INTRODUCTION: Normally abdominal portion of the gastrointestinal tract is supplied by coeliac trunk (CT), superior mesenteric artery (SMA) and inferior mesenteric artery which are unpaired ventral branches of the abdominal aorta.
The accessory renal artery on left was originating below the origin of inferior mesenteric artery and after ascending supero laterally to left IVC entered the lowest part of the hilum of the left kidney.
The right branch anastomoses with the right colic artery while the left branch anastomoses with left colic artery, which is a branch of the inferior mesenteric artery. Continuing distally along the main trunk of the superior mesenteric artery, the right colic artery is the second of the three branches from the right side of the main trunk of the superior mesenteric artery.
Initially the inferior mesenteric artery descends anteriorly to the aorta and then passes to the left as it continues inferiorly.
The lower pole of both kidneys was fused by the isthmus and was below the origin of inferior mesenteric artery. The inferior mesenteric vessels passed in front of the isthmus (fig no: 1).
An accessory renal artery was seen arising at about 1.5 cm below the origin of the Inferior Mesenteric Artery (IMA) from the antero lateral aspect of the Aortic Bifurcation (Figure 1, 3& 4), an aberrant renal artery was seen coursing upwards, backwards and laterally & made its portal of entry by penetrating into the medial border (Figure 2, 3 & 4) and extending on to the posterior surface by piercing the capsule just half cm.

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