Proventriculus - Anatomy & Physiology

Introduction

The proventriculus is also referred to as the glandular stomach. It is connected by the isthmus to the gizzard.

Structure and Function

Proventriculus Anatomy - RVC 2008

The proventriculus is a storage organ in fish and flesh eating birds. It is appropriate to a soft diet and secretes digestive enzymes. It contacts the left lobe of the liver ventrally and laterally. It is related dorso-caudally to the spleen. It is more cranial than the gizzard and lies to the left of the midline of the bird. It is spindle/fusiform shaped and is roughly 4cm long. The lumen diameter is similar to the oesophagus. There is no oesophageal sphincter.

Histology

Proventriculus Histology - Dr. Thomas Caceci and Dr. Ihab El-Zhogby, Department of Histology, Faculty of Veterinary Medicine, Zagazig University, Egypt

• Mucous cells

• Columnar epithelium

• Basophilic

• Papillae- through which collecting ducts from glands run

• Lamina propria run into the papillae

• Hydrochloric acid and pepsin produced

• Glands in the submucosa

• Single tubular glands are grouped into lobules with a common opening into a papillae

• Serous membrane of mesothelial cells attached to the outer longitudinal layer of muscle

• 3 layers of lamina muscularis

• No parietal cells

Links

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