title: The origins of the adrenergic fibres which innervate the internal anal sphincter, the rectum, and other tissues of the pelvic region in the guinea-pig.
mesh_terms: D001003:Anal Canal / Q000294:innervation*; D000818:Animals; D001808:Blood Vessels / Q000294:innervation; D005453:Fluorescence; D005725:Ganglia, Autonomic; D006168:Guinea Pigs / Q000033:anatomy & histology*; D008297:Male; D009197:Myenteric Plexus; D010413:Penis / Q000294:innervation; D012007:Rectum / Q000098:blood supply / Q000294:innervation*; D013368:Submucous Plexus; D013564:Sympathetic Nervous System / Q000033:anatomy & histology*