Everything about The Superior Vena Cava totally explained
The
superior vena cava is a large, yet short
vein that carries deoxygenated
blood from the upper half of the body to the
heart's
right atrium. It is shorter than the complementary
inferior vena cava.
It is formed by the left and right
brachiocephalic veins, (also referred to as the
innominate veins) which receive blood from the
upper limbs and the
head and
neck, behind the lower border of the first right
costal cartilage. The
azygous vein (which receives blood from the
rib cage) joins it just before it enters the right atrium, at the upper right front portion of the heart. It is also known as the cranial vena cava in animals.
No
valve separates the superior vena cava from the right atrium. As a result, the (right) atrial and (right) ventricular contractions are conducted up into the
internal jugular vein and, through the
sternocleidomastoid muscle, can be seen as the
jugular venous pressure. In
tricuspid valve regurgitation, these pulsations are very strong.
Additional images
Image:Gray480.png|Diagram showing completion of development of the parietal veins.
Image:Gray490.png|Front view of heart and lungs.
Image:Gray494.png|Heart seen from above.
Image:Gray503.png|Transverse section of thorax, showing relations of pulmonary artery.
Image:Gray505.png|The arch of the aorta, and its branches.
Image:Gray577.png|The brachiocephalic veins, superior vena cava, inferior vena cava, azygos vein and their tributaries
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