What is role strain in sociology? A: Role strain in sociology is when a particular role a person needs to fulfill is strained due to excessive obligations or multiple demands on time, energy or available resources.
Short posterior ciliary arteries: Branch from the ophthalmic artery and pierce the sclera at the edge of the optic nerve; they supply the choroid and the rods and cones of the retina. Long posterior ciliary arteries: Branch from the ophthalmic artery and pierce the sclera to supply the ciliary body and iris.
Nerve supply is by sympathetic and parasympathetic to the ganglia, which is superior mesenteric ganglia. Sympathetic origin is from the thoracic 6-9 ganglia, via greater splanchnic nerve, that has a synapse with the superior mesentery ganglia.