Changes

*Basiliar artery

*Basiliar artery

*The anastomosing ramus from the maxillary artery to the internal carotid artery  

*The anastomosing ramus from the maxillary artery to the internal carotid artery  

*The connection of the vertibral artery to the internal carotid artery  

*The connection of the vertebral artery to the internal carotid artery  

 

[[Image:Calfvssheepblood.jpg|thumb|right|150px|Calf vs Sheep blood supply comparism. RVC 2008]]  

[[Image:Calfvssheepblood.jpg|thumb|right|150px|Calf vs Sheep blood supply comparism. RVC 2008]]  

 

Channels 1 and 2 supply the arterial circle. Neither channel has a [[#Rete_Mirable|rete mirable]]. The internal carotid artery blood reaches all of the cerebral hemisphere except for it's most caudal part. Vertebral blood supplies the the remainder of the cerebral hemisphere and the rest of the brain.

*'''Channels 1 + 2''' supply the arterial circle.  

*Neither channel has a '''[[#Rete_Mirable|rete mirable]]'''.  

===Sheep and Cat===

*Internal carotid blood reaches all of the cerebral hemisphere '''except for it's most caudal part'''.  

Only channel 3 supplies the arterial circle and unlike in the dog, this channel has a rete mirable. Channel 2 carries blood away from the arterial circle. Maxillary blood is distributed to all of the brain except the caudal part of medulla oblongata, which is supplied by vertibral blood.

*'''Vertebral blood''' supplies the the remainder of the cerebral hemisphere and the rest of the brain.

 

===Ox===

==== Sheep and cat  ====

Channels 3 and 4 both supply the arterial circle and each has a rete mirable. Channel 2 carries blood away from the arterial circle. A mixture of maxillary and vertebral blood reaches all parts of the brain.

 

*'''Only channel 3''' supplies the arterial circle.

*Channel 3 has a '''rete mirable'''.  

*'''Channel 2 carries blood away''' from the arterial circle.  

*Maxillary blood is distributed to all of the brain except the caudal part of medulla oblongata, which is supplied by vertibral blood.

 

==== Ox ====

 

*'''Channels 3 + 4''' both supply the arterial circle.

*Each has a '''rete mirable'''.  

*'''Channel 2 carries blood away''' from the arterial circle.  

*A mixture of maxillary and vertibral blood reaches '''all parts of the brain'''.

[[Category:Nervous_System_-_Anatomy_&_Physiology]] [[Category:To_Do_-_A&P]]

[[Category:Nervous_System_-_Anatomy_&_Physiology]] [[Category:To_Do_-_A&P]]