Nerve endings in the heart of amphibia.
D000557:Ambystoma; D000663:Amphibians; D000818:Animals; D001001:Anura; D002025:Bufonidae; D005724:Ganglia / Q000033:anatomy & histology; D006321:Heart / Q000033:anatomy & histology / Q000294:innervation*; D006325:Heart Atria / Q000294:innervation; D009411:Nerve Endings / Q000033:anatomy & histology*; D011898:Ranidae