Ch 6 Vascular Flashcards
Vascular system consists of
Arterial blood supply
Capillary network
Venous drainage
Pterygoid plexus
Venous plexus- Large network of blood vessels within the system
Pterygoid plexus is in head and neck
Anastomosis
Blood vessels communicate within system by connecting channels
Anastomoses occur normally in vascular system servings as
Back up routes for blood flow it blocked
Occur pathologically or with trauma/disease
Artery
Arises from heart and Carrie’s blood away
Starts as large vessel and branches into smaller (arteriole)
Arteriole branches to capillary
Capillary can
Supply blood to a larger tissue area only because there are so many of them
Capillary to venule to vein
Veins
Travel to and carry blood to heart
Much larger and more numerous than arteries
Anastomose freely and greater variability
Facial veins do not have
Valves
Likely for infection to flow back and forth
Pathway Venous blood vessels ____ lymphatic vessels
Which one is more numerous
Parallels
Lymphatic
Venous sinus
Sinus in brain located in ?
Blood filled spaces between 2 layers of tissue
NOT PLEXUS
Dura Mater
Most important venous sinus in dentistry
Where is it located
Cavernous sinus
Can be involved in spread of cancer, dental (odontogenic) infection
Located on lateral surface of sphenoid bone
Major arteries that supply head and neck. Right and left are different
Where do they arise
Common carotid
Subclavian
Aorta
Subclavian arteries
Arise
Major destination
Arise lateral and somewhat horizontal to common carotid
Supply upper extremity/ arms
Common carotid divides into
Internal and external carotid
At level of larynx, thyroid cartilage, carotid sinus
Carotid pulse cpr
Internal carotid
Travels slightly lateral
No branches in neck
Adjacent to internal jugular vein within carotid sheath
