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Questions and Answers
The omasum is a ______-shaped structure containing leaves of tissue.
The omasum is a ______-shaped structure containing leaves of tissue.
globe
The omasum absorbs ______ and other substances from digestive contents.
The omasum absorbs ______ and other substances from digestive contents.
water
The abomasum has a simple ______ epithelium.
The abomasum has a simple ______ epithelium.
columnar
The abomasum is similar to a ______ stomach.
The abomasum is similar to a ______ stomach.
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The pylorus is located in the ______-10th intercostal region.
The pylorus is located in the ______-10th intercostal region.
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The greater omentum attaches to the ______ curvature of abomasum.
The greater omentum attaches to the ______ curvature of abomasum.
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The space between superficial and deep layers of greater omentum is called ______ omentale.
The space between superficial and deep layers of greater omentum is called ______ omentale.
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The dorsal space of the deep wall of the greater omentum is called ______ recess.
The dorsal space of the deep wall of the greater omentum is called ______ recess.
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The ______ is divided into several portions by inflection of the wall known as Pila.
The ______ is divided into several portions by inflection of the wall known as Pila.
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The ______ is the largest stomach compartment in ruminants.
The ______ is the largest stomach compartment in ruminants.
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The lesser omentum attaches to the ______ of the stomach.
The lesser omentum attaches to the ______ of the stomach.
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The ______ is a non-glandular part of the stomach and has a spherical shape.
The ______ is a non-glandular part of the stomach and has a spherical shape.
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The greater omentum attaches to the ______ of the stomach.
The greater omentum attaches to the ______ of the stomach.
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The Lig.hepatogastricum is a ligament that originates from the ______.
The Lig.hepatogastricum is a ligament that originates from the ______.
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The rumen stores food that a ruminant regurgitates, chews again and swallows a second time, which is a function of ______.
The rumen stores food that a ruminant regurgitates, chews again and swallows a second time, which is a function of ______.
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The Velum omentale is present in ______ only.
The Velum omentale is present in ______ only.
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The stomach has a key role in gastrointestinal _______________.
The stomach has a key role in gastrointestinal _______________.
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The _______________ stomach is found in carnivores.
The _______________ stomach is found in carnivores.
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The _______________ stomach has four compartments and is found in ruminants.
The _______________ stomach has four compartments and is found in ruminants.
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The _______________ is the convex and ventral border of the stomach.
The _______________ is the convex and ventral border of the stomach.
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The _______________ is the concave and dorsal border of the stomach.
The _______________ is the concave and dorsal border of the stomach.
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The _______________ is the area where the non-glandular and glandular regions of the stomach meet.
The _______________ is the area where the non-glandular and glandular regions of the stomach meet.
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The _______________ is a type of fat storage tissue that has key biological functions in immune-regulation and tissue regeneration.
The _______________ is a type of fat storage tissue that has key biological functions in immune-regulation and tissue regeneration.
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The _______________ is the part of the stomach that is divided into two distinct areas: non-glandular and glandular.
The _______________ is the part of the stomach that is divided into two distinct areas: non-glandular and glandular.
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Study Notes
Gastric Digestive Function
- The four key components of gastric digestive function are:
- Reservoir function
- Acid secretion
- Enzyme secretion
- Role in gastrointestinal motility
Types of Stomachs
- Simple glandular stomach: found in carnivores
- Simple composite stomach: found in equines, has both glandular and non-glandular regions
- Complex composite stomach: found in ruminants, has four compartments (rumen, reticulum, omasum, and abomasum)
Surfaces of the Stomach
- Facies parietalis
- Facies visceralis
Borders of the Stomach
- Curvatura ventriculi major: convex and ventral border
- Curvatura ventriculi minor: concave and dorsal border
Regions of the Simple Stomach
- Pars cardiac (cardiac part)
- Fundus ventriculi (fundus)
- Corpus ventriculi (body)
- Pars pylorica (pyloric part)
Omentum
- A large, flat, adipose tissue layer that nestles on the surface of intraperitoneal organs
- Has key biological functions in immune-regulation and tissue regeneration
- Two parts: greater omentum and lesser omentum
Greater Omentum
- Attaches to:
- Greater curvature of stomach
- Left lobe of pancreas
- Proximal end of descending colon
- Distal end of ascending colon
- Mesentric root
- Spleen
- Ligaments that originate from the greater omentum:
- Lig.phrenicolienale (phrenicosplenic lig.)
- Lig.gastrolienale (gastrosplenic lig.)
- Lig.gastrophrenicum
- Lig.lienorenale (in horse)
Lesser Omentum
- Attaches to:
- Lesser curvature of stomach
- Cranial part of duodenum
- Visceral surface of liver
- Ligaments that originate from the lesser omentum:
- Lig.hepatogastricum
- Lig.hepatoduodenale
Complex Composite Stomach in Ruminants
- Consists of four compartments: rumen, reticulum, omasum, and abomasum
Rumen
- Largest stomach compartment in ruminants
- Located on the left side of the abdomen
- Divided into several portions by inflections of the wall known as pila
- Function: stores food that is regurgitated, chewed again, and swallowed a second time
- Compartments:
- Sulcus longitudinalis dextra (right longitudinal groove)
- Sulcus longitudinalis sinistra (left longitudinal groove)
- Saccus dorsalis (dorsal sac)
- Saccus ventralis (ventral sac)
- Saccus caecus caudodorsalis (caudodorsal blind sac)
- Saccus caecus caudoventralis (caudoventral blind sac)
- Saccus cranialis (atrium ruminis)
Reticulum
- Non-glandular part of the stomach
- Spherical shape, smallest compartment
- Located between the cranial surface of the rumen and the caudal surface of the diaphragm
- Two surfaces: diaphragmatic and visceral
- Feature: inner side of reticulum wall is honeycomb-like cellulae reticuli formed by crista reticuli in the reticula mucosa
Omasum
- Globe-shaped structure containing leaves of tissue (like pages in a book)
- Function: absorbs water and other substances from digestive contents
- Compartments:
- Ostium reticulo-omasicum
- Ostium omaso-abomasicum
Abomasum
- Simple columnar epithelium
- Gastric glands are present in the lamina propria of the mucosal layer in the pyloric region
- Similar to a non-ruminant stomach
- Located in the right front quadrant of the abdomen, just inside the seventh through 11th ribs
- Features:
- Plicae spirales (large plica) in mucosal surface
- Greater curvature: ventrally
- Lesser curvature: dorsally
- Fundus: in the xiphoid region
- Body: in the midline
- Pylorus: in the 9th-10th intercostal space
- Torus pyloricus (in ruminant) is instead of the pyloric sphincter of the dog and horse
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Description
This quiz covers the key components of gastric digestive function, types of stomachs in different animals, and the surfaces and borders of the stomach.
