title: Substance P-immunoreactive nerve fibers in the heart.
mesh_terms: D000818:Animals; D001011:Aorta / Q000294:innervation; D003331:Coronary Vessels / Q000294:innervation; D006168:Guinea Pigs; D006321:Heart / Q000294:innervation*; D007124:Immunoenzyme Techniques; D009206:Myocardium / Q000378:metabolism*; D009412:Nerve Fibers / Q000378:metabolism; D011651:Pulmonary Artery / Q000294:innervation; D013373:Substance P / Q000378:metabolism*
chemical_list: D013373:Substance P