proventriculus
/ˌprəʊvɛnˈtrɪkjʊləs
/noun (plural proventriculi) Zoology
1The narrow glandular first region of a bird’s stomach between the crop and the gizzard.The proventriculus and gizzard are small, and the lower esophagus is sacculated, which delays passage of particles into the lower gut where additional fermentation occurs in the paired ceca....
- Ingesta from the proventriculus and gizzard were preserved in 75% alcohol and examined under a dissecting scope.
- Parents sustain themselves during incubation on energy stored as body fat and lipid-rich stomach oil in the proventriculus.
1.1The thick-walled muscular expansion of the oesophagus above the stomach of crustaceans and insects.Enhanced levels of expression are seen in older embryos adjacent to the segmental involutions (C, arrowheads) and in the salivary glands, proventriculus, and somatic musculature....
- Four tunnels off the lumen of the proventriculus of the carpenter bee, Xylocopa virginica virginica, have been discovered.
- The proventriculus of the worker honeybee is an organ which effects a highly efficient separation of pollen grains from the medium in which they are suspended.
Origin
Mid 19th century: from pro-2 'before' + Latin ventriculus 'small belly', diminutive of venter, ventr- 'belly'.
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