The Stomach Flashcards
three functions of the stomach
**storage of ingested food
**mechanical and chemical breakdown of food
**production of intrinsic factor for Vitamin B12 absorption in small intestine
food leaves stomach in semi-liquid form called
chyme
two types of stomach anatomy
monogastric
ruminant
simple, single stomach
monogastric
three species with monogastric stomach
dogs
cats
horses
species with ruminant stomachs
cows
goats
sheep
camelids
complex stomach consisting of 4 chambers
ruminant
the monogastric stomach is ____ shaped and is located just behind _____
C shaped
diaphragm
the luminal surface of the monogastric stomach can either be ______ or ______
glandular or nonglandular
four parts of the glandular portion of the stomach
cardia
fundus
body
pylorus
1
Fundus
2
Body
3
Pylorus
4
Cardia
part of the stomach where the esophagus enters
cardia (named because of close proximity to heart)
expanded, dome shaped, blind ended sac, adjacent to the cardia
Fundus
largest section of the stomach
body
distal part of the stomach
pylorus
how is the equine stomach divided
proximal non glandular region
aboral (furthest from the mouth) glandular region
what structure divides the two sections of the equine stomach
Margo plicatus
transient folds in gastric mucosa
rugae
the rugae allows the stomach to do what when its filled with food
expand
what does the rugae increase
surface area for absorption
rugae
the openings of ducts that are lined by glandular cells
gastric pits
three types of glandular cells in gastric pits
mucous neck cells
parietal cells
chief cells
gastric pit cells that produce hydrochloric acid (HCl)
parietal cells
gastric pit cells that secrete a thinner mucous
mucus neck cells
gastric pit cells that secrete pepsinogen
chief cells
a proteolytic enzyme that is essential in the digestive process
pepsin
pepsin begins the chemical digestions of what
proteins
pepsin is activated where
in the fundus
pepsinogen is converted to pepsin in the presence of what
hydrochloric acid (HCl)
last glandular portion of the stomach
pyloric gland region
three regions of the pyloric gland region
pyloric antrum
pyloric canal
pylorus
the pylorus opens into duodenum through what
pyloric sphincter
two cells found in the pyloric region
mucous-secreting cells
gastrin secreting cells (G cells)