High resolution

Module 7: Figure urinogenital tract

Organization and neural innervation of the urinogenital tract.

Smooth muscle cells (SMCs) feature prominently in the function of the urinogenital tract where they control urine transfer to the bladder (ureter SMCs), bladder emptying (detrusor SMCs), contraction of the urethral sphincter (urethral SMCs), penile erection (corpus cavernosum SMCs), sperm transfer (vas deferens SMCs) and uterine contraction during labour (uterine SMCs). Many of these SMCs are under neural control either by parasympathetic (green) or sympathetic (red) nerves. Sensory nerves (blue) carry information into the spinal cord.