Chicken proventriculus is eaten as street food in the Philippines.

The proventriculus is a standard part of avian anatomy.

The organism does not survive posterior to the proventriculus, except in pigeons.

The proventriculus is part of the digestive system of birds, invertebrates and insects.

They produce a stomach oil made up of wax esters and triglycerides that is stored in the proventriculus.

The infective eggs are ingested by a chicken where it reaches the proventriculus and hatches.

The ingested food then enters the cuticle-lined oesophagus and then the proventriculus.

The lesions increase in size and number and extend to the esophagus, crop and proventriculus.

It consists essentially of the proventriculus of a chicken, dipped in cornstarch, and deep-fried.

Then the food passes into their glandular stomach, also called the proventriculus, which is also sometimes referred to as the true stomach.

The passing of pellets allows a bird to remove indigestible material from its proventriculus, or glandular stomach.

The effects of lead poisoning can include ballooning of the proventriculus, weight loss, anemia, and a drooping posture.

The rather backward position of the cluster suggests the stomach was dual in structure, with a forward enzyme-secreting proventriculus preceding a muscular gizzard.

Organs that are commonly affected include the ovary, spleen, liver, kidneys, lungs, heart, proventriculus and adrenals.

Anteriorly is a narrow tubular region, the proventriculus, lined by fundic glands, and connecting the true stomach to the crop.

On necropsy the affected organs appear dilated and may include the crop, proventriculus, ventriculus, and small intestine.

In type II formation, the peritrophic matrix is produced by a specialized group of cells present on the proventriculus of the anterior midgut.

Petechiae in the proventriculus and on the submucosae of the gizzard are typical; there is also severe enteritis of the duodenum.

This oil is created in a stomach organ known as a proventriculus from digested prey items by most tubenoses, and gives them their distinctive musty smell.

Dr. Thomas Caceci (undated) discusses the proventriculus of the avian stomach and opines that:

Stomach oil is the light oil composed of neutral dietary lipids found in the proventriculus (fore-gut) of birds in the order Procellariiformes.

Included in this are the buccal cavity, the pharynx, the oesophagus, the crop (stores food), and proventriculus or gizzard (grinds food).

Ingested blood is pumped into the esophagus, where it dislodges bacteria lodged in the proventriculus and is regurgitated back into the host circulatory system.

While in the insect vector, proteins encoded by Hms genetic loci induce biofilm formation in the proventriculus, a valve connecting the midgut to the esophagus.

Alternately, the foregut may expand into a very enlarged crop and proventriculus, or the crop could just be a diverticulum, or fluid-filled structure, as in some Diptera species.