[An apparatus for registration of the pressure in the gallbladder of birds].
D000818:Animals; D001717:Birds; D004063:Digestion; D004864:Equipment and Supplies; D005704:Gallbladder / Q000502:physiology*; D010827:Physiology / Q000600:supply & distribution*; D011312:Pressure
BIRDS; GALLBLADDER/physiology; PHYSIOLOGY/equipment and supplies