Assertion: udder's vein | /r/HasProperty | 10 - nipple sphincter
Facets:
Source sentences:
text: 5 - superficial saphenous veins and arteries, 6 - milk tank, 7 - nipple tank , 8 - nipple canal opening, 9 - nipple canal, 10 - nipple sphincter, 11 - milk ducts, 12 - bunch of alveoli, 13 - nerves, 14 - myoepithelium, 15 - secretory cells, 16 - duct of the alveoli group.