Page 216 - Veterinary Histology of Domestic Mammals and Birds, 5th Edition

198 Veterinary Histology of Domestic Mammals and Birds

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Stratified
squamous
epithelium

Lamina
propria
mucosae
with glands

10.24 Oesophagus (chicken). Haematoxylin and eosin 10.25 Oesophageal mucosa (chicken). Haematoxylin
stain (x25). and eosin stain (x180).

10.26 Oesophageal mucosa (duck). Haematoxylin and 10.27 Crop mucosa (chicken). Haematoxylin and eosin
eosin stain (x100). stain (x180).

Stomach (gaster, ventriculus) stomach while the stomach of ruminants has multiple
The stomach develops as a dilation of the primitive gut compartments.
tube. Its function is to prepare ingested foodstuffs for The internal surface of the stomach is lined entirely
delivery to the intestine, thus supporting the digestive by glandular mucosa (carnivores) or a combination of
function of the intestinal tract. Digestive processes that glandular and non-glandular mucosa (horses, pigs, rumi-
take place during the temporary storage of food in the nants) (Figure 10.29). In the horse, non-glandular mucosa
stomach include breakdown of proteins and emulsifica- is present in the saccus caecus, from which it continues a
tion of fat by gastric secretions. Differences in the structure short distance into the body of the stomach. In the pig,
of the stomach, including the gastric mucosa, reflect the glands are absent in an area surrounding the cardia and in
varying dietary strategies of the domestic mammals. part of the pars proventricularis. In both species, most of
Carnivores, omnivores and horses have a single-chambered the mucosa is glandular.

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