11) blood supply of the eye and adnexa

Question 1

the eye and the adnexa and manly supplied from branches of which artery ?

Answer 1

internal carotid artery
comming from the common carotid artery

right - branchiocepahlic trunk
left - straight from the aortic arch

Question 2

the internal carotid artery gives which main brach ?

Answer 2

gives the ophthalmic artery ?

Question 3

what are the major branches of the ophthalmic artery and what does it supply ?

Answer 3

central retinal artery - supplying the internal surface of retina
price the sheath surrounding the optic nerve
and pierces the optic nerve itself to enter the retina at the optic disck

ciliary artery - supply the choroid

giving rise to anterior ciliary artery - within the choroidal layer

short posterior ciliary artery - pass around the optic nerve and price the sclera to enter choroid

longe posterioir ciliary artery - run medially then lateral along the anterior aspect of the eyeball pericing the sclera not the choroidal layer
do not make the capillaries
anasatomses with e capillaries of the short posterior ciliary capillaiers and the anterior ciliary artery which makes the major circle of iris coming from the - supplying the iris
anastomosing with eh long posterior and short posterior ciliary artery in the choroid

muscular artery

lacrimal artery

superioir and inferioir palberal artery

Question 4

what about the venous drainage ?

Answer 4

choroid is drained by he vorticose veins

fuse to form superior and inferioir ophthalmic veins

draining into cavernous sinus - within the shunned bone lateral to sella turcica

retina drained into central retinal vein - drain into ophthalmic vein or directly to cavernous minus

Question 5

where does the anterior ciliary artery derive from ?

Answer 5

the muscular artery of the rectus muscle