<P> It is formed by the left and right brachiocephalic veins ( also referred to as the innominate veins ) , which also receive blood from the upper limbs , eyes and neck , behind the lower border of the first right costal cartilage . It passes vertically downwards behind first intercostal space and receives azygos vein just before it pierces the fibrous pericardium opposite right second costal cartilage and its lower part is intrapericardial . And then , it ends in the upper and posterior part of the sinus venarum of the right atrium , at the upper right front portion of the heart . It is also known as the cranial vena cava in other animals . </P>
<P> It is formed by the left and right brachiocephalic veins ( also referred to as the innominate veins ) , which also receive blood from the upper limbs , eyes and neck , behind the lower border of the first right costal cartilage . It passes vertically downwards behind first intercostal space and receives azygos vein just before it pierces the fibrous pericardium opposite right second costal cartilage and its lower part is intrapericardial . And then , it ends in the upper and posterior part of the sinus venarum of the right atrium , at the upper right front portion of the heart . It is also known as the cranial vena cava in other animals . </P>
where does the superior vena cava return blood from
where does the superior vena cava return blood from
upper limbs eyes neck
upper limbs eyes neck