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Subclavian vein

Subclavian vein
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The thyroid gland and its relations. (Right subclavian vein visible at bottom left, left subclavian vein visible at bottom right.)
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Diagram showing completion of development of the parietal veins. (Subclavian vein labeled at right, third from top.)
Details
Latin vena subclavia
Source
axillary vein, external jugular vein
Drains to
brachiocephalic vein
subclavian artery
Identifiers
Gray's p.664
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Anatomical terminology

The subclavian vein is a paired large vein, one on either side of the body. Their diameter is approximately that of the smallest finger.

Structure

Each subclavian vein is a continuation of the axillary vein and runs from the outer border of the first rib to the medial border of anterior scalene muscle. From here it joins with the internal jugular vein to form the brachiocephalic vein (also known as "innominate vein"). The angle of union is termed the venous angle.

The subclavian vein follows the subclavian artery and is separated from the subclavian artery by the insertion of anterior scalene. Thus, the subclavian vein lies anterior to the anterior scalene while the subclavian artery lies posterior to the anterior scalene (and anterior to the middle scalene).

Function

The thoracic duct drains into the left subclavian vein, near its junction with the left internal jugular vein. It carries lymph (water and solutes) from the lymphatic system, as well as chylomicrons or chyle, formed in the intestines from dietary fat and lipids.

The right lymphatic duct drains its lymph into the junction of the right internal jugular vein, and the right subclavian vein.

History

Sub (below), and clavian (pertaining to the clavicle).

See also

Additional images



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