Digestive System

Question 1

Pig Digestive System

Answer 1

NON-RUMINANT:
- 1 stomach (containing cardiac sphincter, cardia, fundus)

MOUTH:

• Hard, stiff lips
• Tongue is covered with MM’s

PHARYNX:
- Has a pharyngeal diverticulum which opens into the pharynx

SMALL INTESTINE:

• Duodenum
• Jejunum
• Ileum

LARGE INTESTINE:
- Ascending, descending and terminal colon

RECTUM:
- Terminal part

Question 2

Cow Digestive System

Answer 2

RUMINANT:
- 4 stomachs (abomasum, reticulum, rumen and omasum)

MOUTH:

• No upper incisiors; hard pad of tissue
• Hard, stiff lips
• Tongue is covered with MM’s
• Use their tongue as a prehensile organ

LIVER:
- Liver is pushed to the right due to the reticulorumen

SMALL INTESTINE:

• Duodenum
• Jejunum
• Ileum

LARGE INTESTINE:

• Caecum (provides further space for microbial digestion)
• Large intestine forms a double spiral

RECTUM:
- Terminal part

Question 3

List all the structures of the non ruminant digestive system

Answer 3

Mouth (teeth, tongue and salivary glands)
Pharynx (tonsils)
Oesophagus
Stomach (cardia, fundus, body, pyloric region)
Small Intestine (duodenum, jejenum, ileum)
Large Intestine (caecum, colon, rectum, anal canal)

Question 4

Non ruminant stomach

Answer 4

cardia, fundus, body, pyloric region

Question 5

Animal mouth

Answer 5

Lips - Stiff and hard in cattle and pigs

Oral cavity -
Hard Palate -
Formed by horizontal elements of the incisive, maxillary and palatine bones and is covered by thick mucous membrane

Soft Palate-
Comprised of muscle and mucosa

Question 6

Pharynx

Answer 6

Caudal to oral and nasal cavity

Lined by mucous membrane and surrounded by muscles.

Divided into:
Nasopharynx, oropharynx and Laryngopharynx

Muscles on the walls are responsible for directing food and air to oesophagus and the trachea respectively.

Pig = Pharyngeal diverticulum - that opens into the dorsal wall of the pharynx near the beginning of the oesophagus. – Need to take care not to put stomach tubes or meds delivered via a balling gun into this space.

Question 7

Oesophagus

Answer 7

Muscular tube

Lined with mucous membrane which is folded to allow dilation during swallowing.

Runs from pharynx, enters the thorax and continues into the abdominal cavity where is joins the stomach.