Proventriculus - Anatomy & Physiology

ALIMENTARY SYSTEM AVIAN DIGESTIVE TRACT

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

• A storage organ in fish and flesh eating birds

• Appropriate to a soft diet

• Secretes digestive enzymes

• Contacts the left lobe of the liver ventrally and laterally

• Related dorso-caudally to the spleen

• More cranial than the gizzard

• Lies to the left of the midline of the bird

• Spindle/fusiform shaped

• Roughly 4cm long

• Lumen diameter similar to the oesophagus

• 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

Test yourself with the Avian Alimentary Tract flashcards

Avian Alimentary Tract Flashcards