Summary Veins and Circulation

Veins
• The superior vena cava is a large
vein that carries the
deoxygenated blood from the upper
half of the body and returns it to the
right atrium. It is formed by the union
of the right and left brachiocephalic
veins at the level of the right 1st rib.
The brachiocepalic veins are formed
by the union of the internal jugular
vein and subclavian vein.
• The inferior vena cava is a large vein
that carries the deoxygenated blood
from the lower and middle body into
the right atrium. It is formed by the
union of the right and left common
iliac veins at the level of L5.

, VEINS of the head and neck
• Internal jugular veins receive
blood from the face, brain and
neck. They arise as a
continuation of the sigmoid
sinuses at the base of the
skull in the jugular foramen
• Internal jugular vein arises at
the cranial base in the jugular
foramen from the sigmoid
sinus.
• Internal jugular vein passes
inferiorly and units with the
subclavian vein to form the
brachiocephalic vein.

, Veins
• Intracranial vascular sinuses
are located between layers
of the dura mater and
receive blood from the
brain, emissary, diploic
and meningeal veins