Proventriculus

The proventriculus is part of the digestive system of birds.[1] An analogous organ exists in invertebrates and insects.

  1. ^ Encarta World English Dictionary [North American Edition] (2007). Proventriculus. Source: "Proventriculus definition - Dictionary - MSN Encarta". Archived from the original on 2008-01-07. Retrieved 2007-12-18. (accessed: December 18, 2007)