teat sinus

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teat sinus

the cavity which occupies most of the volume of the teat; dorsally it is continuous with the mammary gland sinus; ventrally it leads into the papillary duct (teat canal) and to the exterior; its confines consist of the distensible teat wall. Called also teat cistern.

teat sinus absent
congenital defect immediately branding the animal as a cull.