The carotid body of the Weddell seal (Leptonychotes weddelli).
D000818:Animals; D010872:Caniformia; D002344:Carotid Body / Q000033:anatomy & histology / Q000098:blood supply / Q000166:cytology*; D005260:Female; D008297:Male; D008854:Microscopy, Electron; D009411:Nerve Endings / Q000166:cytology