Nerve endings in the human endocardium.
D004699:Endocardium / Q000294:innervation*; D006325:Heart Atria / Q000294:innervation; D006351:Heart Valves / Q000294:innervation; D006352:Heart Ventricles / Q000294:innervation; D006801:Humans; D009411:Nerve Endings / Q000033:anatomy & histology* / Q000166:cytology; D009415:Nerve Net