Blood Vessels and Lymphatics Flashcards
R common carotid and R subclavian vein come off the _____
brachiocephalic trunk (artery)
Inferior thyroid artery supplies blood to the_______ and has a close relationship with_______
thyroid gland
recurrent laryngeal nerve
L common carotid and L subclavian come off the _______
aorta
Structures posterior to anterior scalene (2)
subclavian a
brachial plexus
Structures anterior to anterior scalene (2)
subclavian vein
phrenic nerve
The three parts of subclavian a are divided by
anterior scalene m.
First branch off subclavian a
vertebral a
Vertebral artery courses through _______ and merges to form the ______
CV 6-1
basilar artery
Vertebral artery supplies ____% of blood to the brain and is responsible for the _______circulation
20
posterior
Subclavian Steal Syndrome
due to obstruction of the subclavian a, proximal to the vertebral a
EPISODIC increase in peripheral circulatory demand in associated extremity
due to physical work/exercise
SHUNTING of blood from the vertebro-basilar circulation into distal subclavian a.
can cause vertebrobasilar insufficiency
Vertebro-basilar insufficiency
decrease in blood flow to the brain
may result in coma, quadriplegia, numerous cranial abnormalities
(dizziness, CN dysfunction, paralysis, loss of consciousness)
type of ischemia
an episode may result in transient or permanent neurological damage
Second branch off subclavian a
Thyrocervical trunk
branching is variable
what important branch off thyrocervical trunk runs with an important nerve?
inferior thyroid artery running with recurrent laryngeal nerve
Inferior thyroid a gives off what branches
ascending cervical artery
inferior laryngeal artery
The recurrent laryngeal nerve enters the larynx with what artery
inferior laryngeal artery
Does the internal carotid artery have branches in the neck
no
The internal carotid artery supplies the brain via the _____ portion of the circle of willis
anterior
The internal carotid gives off its first branch________ and then (in the cranial vault) bifurcates into
ophthalmic a
anterior cerebral a
middle cerebral a
the ICA supplies _____% of blood to the brain via the circle of willis
80
The Circle of Willis is
asymmetrical and incomplete
Changes in cerebral blood are ________ to a degree
autoregulated
significant shunting of blood from on region of circulation to another may result in hyperperfusion and edema
input must =output
cerebral arteries are ____ arteries, each with their own _____
end
territory
Three important branches of external carotid a
Superior thyroid a
superficial temporal a
maxillary a.
first branch of External carotid a
Superior thyroid a (blood supply to the thyroid)
major branch of superior thyroid artery
superior laryngeal artery, which pierces the thyrohyoid membrane along with internal laryngeal n
The two terminal branches of external carotid artery are
superficial temporal artery
maxillary artery
important branch of the first part of maxillary artery
middle meningeal artery
terminal branch of maxillary artery
sphenopalatine artery
sphenopalatine artery supplies
it is major arterial supply to the posterior 2/3 of the nasal cavity
(posteriolateral wall of nasal cavity, and nasal septum)
veins from face and neck will eventually go into
IJV or brachocephalic vein
EJV made of
retromandibular vein maxillary vein pterygoid plexus posterior auricular vein anterior jugular vein
Superior bulb of the IJV ______ have a valve. Inferior bulb of the IJV_____ have a valve.
does not
does
at the base of the skull, CN IX-XII are located between
IJV and ICA
Deep cervical lymph nodes are intimately associated with_____
IJV
Tributaries of IJV
facial vein
lingual v
superior and middle thyroid vv
right lymphatic trunk and left thoracic duct also empty into IJV
Pericervical lymph nodes
“collar” around base of head
drain directly or indirectly to deep cervical lymph nodes
regionally named (ie submandibular)
Superficial cervical lymph nodes
two groups adjacent to external jugular (posterior)
adjacent to anterior jugular (anterior)
drain into deep cervical lymph nodes
Deep cervical lymph nodes have two groups
jugulo-digastric
jugulo-omohyoid
Deep cervical lymph nodes are located along the length of
IJV
Jugular trunk (lymphatic) drains into the _______ on the left and the ________ or ______ on the right
thoracic duct
right lymphatic duct
IJV/ subclavian vein junction
Thoracic duct is found only on what side
Left
Thoracic duct receives lymph from
left side of head and all of the body except the right upper extremity
lymph from the right UE and right side of the head drains to
right lymphatic duct
