Blood supply Flashcards
Horse
Circle of willis- Extracrainal internal carotid arteries
Hindbrain- vertebrobasilar system
Dog
Circle of willis- Extracranial internal carotid and some extrernal carotid
Hindbrain- vertebrobasilar system
Cat/ small rum
Circle of willis- external carotid and small internal carotid
Hindbrain- Basilar artery
Cow
Cirlce of willis- external carotid and vertebrobasilar system
Hindbrain- vertebrobasilar system
Circle of willis
always supplied directly by the intracranial internal carotid artery
Collateral pathways
formed by arterial anastomoses, provide redundancy to protect from blockage of carotid circulation
Layers of Dura
Periosteal meningeal
Rete Mirable
maxillary a anastomoses w internal carotid and entres the circle of willis
Intracranial veins
Drain brain directly
Pial veins, dural veins/sinuses, cortical veins, central veins, brainstem veins
Extracranial veins
Jugular branches, vertebral veins, internal and external vertebral venous plexus
Cervical spinal cord
vertebral arteries
Thoracic spinal cord
dorsal intercostal a.
Lumbar spinal cord
lumbar dorsal segmental a.
