Digestive System Flashcards
Chewing is _____ particle size and _____ the surface area of the grass.
Decreasing , Increasing
What starts the digestion?
The Molars
Mechanical Digestion:
- Decreases particle size
- Increases surface area
- Causes saliva to be secreted
Saliva is important because …
it acts as a buffer to protect against acid and helps create the bolus.
What is a Bolus?
An oval shaped thing of packed food particles and saliva to aid horses in swallowing their food
The Foregut includes:
- Esophagus
- Cardiac Sphincter
- Saccus Ceacus (first part of stomach)
- Esophageal Region (second part of stomach)
- Fundic Region (third part of stomach)
- Pyloric Region (fourth part of the stomach)
- Pyloric Sphincter
- Margo Plicatus
- Small Intestines (Duodenum, Jejunum, Ilium)
How long is the Esophagus of a horse and on what side is it located?
- 4 ft long
- located on the left side
What is the Cardiac Sphincter?
It is the flap separating the esophagus and the stomach .
What lives in the Saccus Ceacus?
Bacteria and Microorganisms
The stomach is composed of :
- Saccus Ceacus
- Esophageal Region
- Fundic Region
- Pyloric Region
- Pyloric Sphincter
Parts of the Fundic Region and Pyloric Region secrete ____ due to _____ digestion.
HCl , Acid
The stomach continuously secretes …
HCl
What is the function of the Margo Plicatus?
To separate the two linings of the stomach
The Squamous Mucosa is composed of …
the Saccus Caecus, Esophageal Region, and the top half of the Fundic Region
The Glandular Mucosa is composed of …
the bottom half of the Fundic Region, Pyloric Region, and the Pyloric Sphincter
True or False: The Squamous Mucosa is effected by acid.
False
True or False: The Glandular Mucosa is effected by acid
True
Peristalsis is another word for …
Swallowing
The Stomach is the site for ______ digestion.
Chemical
Ulcers are found where in the stomach of a horse?
The Magro Plicatus
___% of the horses digestive tract is the stomach.
10
True or False: No nutrients are absorbed in the stomach.
True
True or False: Food leaves the stomach after 30 min of intake.
True
True or False: The stomach stays full all day long.
False . The stomach empties after 2 hours of initial intake.
The foregut is __% of the digestive tract.
35
The small intestines are __ feet long.
70
The three section of the small intestine are …
- Duodenum
- Jejunum
- Ilium
The first time enzymatic digestion, bile, and absorption takes place is in the …
Duodenum
The small intestine digests:
- starch
- sugars
- protein
- fat
- minerals
- vitamins
_____ is not digested in the small intestines but in the cecum.
Fiber
The Hindgut includes:
- Illeocecal Valve
- Cecum
- Large intestines (Colon)
- Rectum
- Anus
How long is the Cecum and where is it located?
- 4 ft long
- right flank
How often does the cecum flush?
every 3-5 min.
The Cecum is the primary site for ______/______ digestion.
Microbial / Fermentative
The Large and Small Colon of the horse runs where?
under the horses stomach
The Large Colon is the Primary site for …
Water absorption
The Rectum forms what?
The horses poop shape
