00:01
Now that we've seen
the arterial supply,
let's take a look at the
venous drainage of the head.
00:07
In order to understand the
venous drainage of the head,
we're gonna have to go
back to the parotid gland.
00:13
And that's because the product
gland is going to contain
one of the most important
sources of venous drainage
of the head and neck.
00:20
And that's going to be
the retromandibular vein.
00:23
Of course retromandibular
is very descriptive
telling you it's sitting along the
posterior aspect of the mandible.
00:29
The retromandibular vein
is formed from the
superficial temporal vein
joining the maxillary vein.
00:37
But the retromandibular vein
is going to have two divisions:
an anterior and a
posterior division.
00:44
The posterior division of
this retromandibular vein
is going to join the
posterior auricular vein
and drain through the
external jugular vein,
which is going to be external to
this sternocleidomastoid muscle.
01:00
The anterior division is going
to join with the facial vein
to drain into the
internal jugular vein
on the deep surface of the
sternocleidomastoid muscle.