W3: Blood Vessels of the Head and Neck Flashcards
LO
LO arteries vs veins.
- Features of arteries, comment on
A) endothelium thickness
B) valves?
C) pathways?
D) are arteries Superficial to veins?
Thicker
No valves
Pulmonary N systemic
No, veins Superficial
- Arteries of the neck
A) giant trunk coming off heart and its 3 branches are?
B) one of the branch further divides into 2 arteries what is it?
Arch of Aorta: BCT,LCC,LSUBC
BT= RCC and RSUBC
BRACHIOCEPHALIC TRUNK divides into what 2 arteries?
Right common carotid
Right subclavian
Label
Which artery has an anterior, posterior and terminal branch?
List the branches.
- External Carotid Artery Branches
EXTERNAL CAROTID ARTERY
Label
A) what is main artery
B) anterior vs posterior vs terminal branches?
- External Carotid Artery Branches
What are the anterior branches of the external carotid artery?
- External Carotid Artery Branches
DEFINITIVE FEATURES OF ANTERIOR BRANCHES
Where does the facial artery branch from?
What are further 4 branches of the facial artery?
- External Carotid Artery Branches
BRANCHES OF THE FACIAL ARTERY
Label 1,2,4,16.
What is the main artery and its branches?
v
What are the posterior branches of the external carotid artery?
- External Carotid Artery Branches
DEFINITIVE FEATURES OF POSTERIOR BRANCHES
- ascending pharyngeal
- occipital
- ear
What does the external carotid artery bifurcate terminally as?
v4. External Carotid Artery Terminal Branches
BIFURCATION OF THE EXTERNAL CAROTID
External Carotid Artery Terminal Branches
- External Carotid Artery Terminal Branches
A) what is maxillary artery branched from?
B) what is its branches?
- External Carotid Artery Terminal Branches
MAXILLARY ARTERY BRANCHES
Label
- External Carotid Artery Terminal Branches
Which artery is unbranched in neck then arises through bifurcation of the CCA?
- Internal Carotid Artery
remains unbranched in neck, makes way to cranial fossa. dw too much abt it.
Vein Fts
- walls
- called ‘t______’
- how does it travel to heart?
- valves?
blood coming back to heart
- blood with no oxygen, return low pressure
- 80% body is in venous system
- thin walled, in specimen it’s blue tinge (thick= pale)
- venous return helped by valves and gravity (H&N gravity helps) and adj pressure from structures.
- variation in veins- diff for each person
- not branches, tributaries (blood from periphery to heart)
a) main vein to blood
b) tributery to that main blood
c) tributery to b
. Veins of the neck
SUPERIOR VENA CAVA
TRIBUTARIES
- SVC drains all Deox blood to heart
- tributaries of 2x BCV
- internal juglar vein + subclavian
- tributary to jugular vein
Veins of the neck
JUGULAR VEINS
2 types
- external and internal (deep),
- diff btw is that internal forms tributary with Subclavian
- Veins of the neck
- EJV drains to subclavian
What are the tributaries of retromandibular vein?
Describe the anterior and posterior tributary branches of the RMV:
- Retromandibular Vein Tributaries and branches
Where is the pterygoid venous plexus?
What drains into it?
Where does it drain to?
- Pterygoid Venous Plexus
- veins on head come down to join Retromandibular vein (behind mandible)
- RMV divides to post and ant branch
- anterior branch form tribs to common facial vein
- facial vein across face + Ant branch of RMV= drain to internal jugular vein (formed in cranial foss) -> brachiocephalic vein
DIFF
- post RMV: tribs to post. auricular vein, form ext. jugular vein in neck. on sternocleido muscle (vs internal formed at skull)
Do sinuses have veins?
Where do they drain?
- Intracranial Venous Sinuses
brain has layer of dura
- dura close to skull
-layer of dura that dips down to go down btw parts of brain
- parts of dura that goes up
- top = periostium, bottom is meningeal: space btw= sinuses
- veins from bones
- lots of venous sinuses
- MOST drain to internal jugular vein
List the posterior branches of the external carotid artery
- a pharyngeal
- ear
- occ
List the terminal branches of the brachiocephalic trunk
Its two terminal branches are the right carotid artery (which sends blood to your brain) and your right subclavian artery (which sends blood to your right arm).
List the terminal branches of the external carotid artery
Which branch of the maxillary artery supplies the mandible?
The inferior alveolar artery - runs inferiorly and anteriorly towards the inferior alveolar nerve, to meet the nerve at the mandibular foramen. The artery runs further anteriorly in the mandible, supplying the pulps of the mandibular teeth (with its dental branches) and the body of the mandible.
List the three types of jugular veins
Exterior jugular veins: These veins provide blood flow return from areas outside your skull. …
Interior jugular veins: These are larger than the external veins and allow blood from your brain to return to your chest. …
Anterior jugular veins: These are the smallest of the jugular veins.
List the tributaries of the external jugular vein
Besides the posterior division of the retromandibular vein and the posterior auricular vein, the external jugular vein also receives the cervical, suprascapular and anterior jugular veins as tributaries near its termination
What is an extensive valveless bunch of veins that parallels the medial two thirds of the maxillary artery on the lateral aspect of the medial pterygoid muscle, within the infratemporal fossa?
pterygoid venous plexus
- form maxillary vein
- what drains into it? when look at max artery and where its going (e.g. mandible, teeth, palate)… those regions supp by artery= go to venous plexus and drain in (max vein?)
Note. Many veins in head have no valves. Potential route of infection.
