Digestive System

Question 1

Chewing is _____ particle size and _____ the surface area of the grass.

Answer 1

Decreasing , Increasing

Question 2

What starts the digestion?

Answer 2

The Molars

Question 3

Mechanical Digestion:

Answer 3

• Decreases particle size
• Increases surface area
• Causes saliva to be secreted

Question 4

Saliva is important because …

Answer 4

it acts as a buffer to protect against acid and helps create the bolus.

Question 5

What is a Bolus?

Answer 5

An oval shaped thing of packed food particles and saliva to aid horses in swallowing their food

Question 6

The Foregut includes:

Answer 6

• 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)

Question 7

How long is the Esophagus of a horse and on what side is it located?

Answer 7

• 4 ft long

- located on the left side

Question 8

What is the Cardiac Sphincter?

Answer 8

It is the flap separating the esophagus and the stomach .

Question 9

What lives in the Saccus Ceacus?

Answer 9

Bacteria and Microorganisms

Question 10

The stomach is composed of :

Answer 10

• Saccus Ceacus
• Esophageal Region
• Fundic Region
• Pyloric Region
• Pyloric Sphincter

Question 11

Parts of the Fundic Region and Pyloric Region secrete ____ due to _____ digestion.

Answer 11

HCl , Acid

Question 12

The stomach continuously secretes …

Answer 12

HCl

Question 13

What is the function of the Margo Plicatus?

Answer 13

To separate the two linings of the stomach

Question 14

The Squamous Mucosa is composed of …

Answer 14

the Saccus Caecus, Esophageal Region, and the top half of the Fundic Region

Question 15

The Glandular Mucosa is composed of …

Answer 15

the bottom half of the Fundic Region, Pyloric Region, and the Pyloric Sphincter

Question 16

True or False: The Squamous Mucosa is effected by acid.

Answer 16

False

Question 17

True or False: The Glandular Mucosa is effected by acid

Answer 17

True

Question 18

Peristalsis is another word for …

Answer 18

Swallowing

Question 19

The Stomach is the site for ______ digestion.

Answer 19

Chemical

Question 20

Ulcers are found where in the stomach of a horse?

Answer 20

The Magro Plicatus

Question 21

___% of the horses digestive tract is the stomach.

Answer 21

10

Question 22

True or False: No nutrients are absorbed in the stomach.

Answer 22

True

Question 23

True or False: Food leaves the stomach after 30 min of intake.

Answer 23

True

Question 24

True or False: The stomach stays full all day long.

Answer 24

False . The stomach empties after 2 hours of initial intake.

Question 25

The foregut is __% of the digestive tract.

Answer 25

35

Question 26

The small intestines are __ feet long.

Answer 26

70

Question 27

The three section of the small intestine are ...

Answer 27

- Duodenum - Jejunum - Ilium

Question 28

The first time enzymatic digestion, bile, and absorption takes place is in the ...

Answer 28

Duodenum

Question 29

The small intestine digests:

Answer 29

- starch - sugars - protein - fat - minerals - vitamins

Question 30

_____ is not digested in the small intestines but in the cecum.

Answer 30

Fiber

Question 31

The Hindgut includes:

Answer 31

- Illeocecal Valve - Cecum - Large intestines (Colon) - Rectum - Anus

Question 32

How long is the Cecum and where is it located?

Answer 32

- 4 ft long | - right flank

Question 33

How often does the cecum flush?

Answer 33

every 3-5 min.

Question 34

The Cecum is the primary site for ______/______ digestion.

Answer 34

Microbial / Fermentative

Question 35

The Large and Small Colon of the horse runs where?

Answer 35

under the horses stomach

Question 36

The Large Colon is the Primary site for ...

Answer 36

Water absorption

Question 37

The Rectum forms what?

Answer 37

The horses poop shape