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.
Nerves and Blood Vessels. Nerves of the Leg. Nerves innervate muscles and skin. The nerves of the leg all originate from the lumbar plexus and sacral plexus.This group includes the sciatic nerve, femoral nerve, obturator nerve, tibial nerve and common fibular nerve (which splits into the superficial fibular nerve and deep fibular nerve).he blood vessels supply the muscles and skin. Arteries carry oxygenated blood to the muscles, whereas veins transport deoxygenated blood away from the muscles.