Digestive system cat and dog

Question 1

what are to components of the digestive system (digestive tract)

Answer 1

-mouth
-pharynx
-oropharynx
-laryngopharynx
-esophagus
-stomach
-small intestine
-large intestine

Question 2

what are the components of the digestive system (glands)

Answer 2

-salivary
-pancreas
-liver

Question 3

digestive tract wall

Answer 3

-four layers
-mucosa: epithelium, which is supported by connective tissue
-(submucosa: connective tissue)
-tunica muscularis, smooth or skeletal muscle
-tunica serosa/adventitia

Question 4

what is the digestive tract epithelium made of

Answer 4

-stratified squamous
-lips through esophagus and anal canal
-non-keratinized and keratinized

-simple columnar
-ever where not worried about abrasion
-good for absorbtion
-ie. stomach, large intestine, not anal canal

-lots of cells and glands that produce mucus

Question 5

where do we see stratified squamous tissue

Answer 5

regions
-ie. non keratinized: lips, proximal anal canal
-ie. keratinized: hard palate, tongue
-ie. both: cheeks, oropharynx, esophagus

Question 6

the mouth

Answer 6

-oral cavity and its walls
-accessory structures that:
-project into oral cavity: teeth and tongue
-drain into oral cavity: salavary glands
-no submucosa or tunica muscularis

Question 7

teeth classification according to morphology

Answer 7

-can be classified according to morphology
-branchydont=low crown reletive to roots
-hypsodont=high crown
-radicular hypsodont=eventually form shallow roots
-aradicular hypsodont= never form roots

Question 8

teeth classification according to position and function

Answer 8

-incisors
-canine
-premolar
-molar

Question 9

dogs permanent dental formulae

Answer 9

3 1 4 2
3 1 4 3

Question 10

cat permentant dental formulae

Answer 10

3 1 3 1
3 1 2 1

Question 11

tongue

Answer 11

-muscular organ filling the oral cavity
-lingual papillae=projections on dorsal and lateral surfaces

Question 12

different kinds of papillae on cat and dogs tongues

Answer 12

–six types of lingual papillae classified according to shape
-cat and dog tongues have five of the six types
-gustatory vs mechanical
-fungiform, vallate, and foliate papillae bear taste buds
-filiform, conical, and lentiform papillae have mechanical roles

Question 13

salivary glands

Answer 13

-lots of minor salivary glands important only local
-5 major salivary glands in common domestic carnivores
-monostatic sublingual gland
-polysomatic sublingual gland
-parotid gland
-mandibular gland
-zygomatic gland

Question 14

pharynx

Answer 14

-musculomembranous crossway between nasal and oral cavities and larynx and esophogus
-oropharynx
-nasopharynx
-laryngopharynx

Question 15

esophagus

Answer 15

-muscular tube that transports bolus from laryngopharynx to stomach
-cervical, thoracic and abdominal portions
-tunica muscularis varies in composition between common domestic mammals
-ruminants: skeletal muscle along entire length
-others: switch to smooth muscle near stomach
-but always has two layers

Question 16

peritoneum

Answer 16

-mesothelium supported by loose connective tissue (serosa)
-simple squamous epithelium

Question 17

parietal peritoneum

Answer 17

-serosa lining inner wall of abdominal, pelvic, and scrotal cavities

Question 18

visceral peritoneum

Answer 18

serosa covering organs suspended in these cavities (abdominal, pelvic, scrotal)

Question 19

connecting peritoneum

Answer 19

double sheet of peritoneum that connects peritoneum or regions of visceral peritoneum

Question 20

peritoneal cavity

Answer 20

closed by layers of peritoneum- parietal and visceral
-surrounds suspended organs

Question 21

stomach

Answer 21

-tunica muscularis has three layers
-outter longitudal, middle circular, inner oblique
-mucosa can be devided into three glandular regions
-cardiac gland region: mucous glands with occasional periental cells
-gastric (fundic) gland region: glands constructed mostly of parietal and chief cells
-pyloric gland region: mucous glands with interspaced parietal cells
-parietal cells secrete HCl
-chief cells secrete pepsinogen

Question 22

pancreas

Answer 22

-right and left lobes connected by body
-exocrine and endocrine functions
-pancreatic enzymes that aid in digestion carried out to decending dupdenum by pancreatic ducts

Question 23

liver

Answer 23

-large gland
-many functions- but our focus in in bile production
-portal vein carries blood form the stomach, intestine, pancreas, and spleen into liver

Question 24

small intestine

Answer 24

-duodenum, jejunum, ileum
-mucosal surface has many finger like projections called villi
-columnar absorptive cells present in mucosa
-tunica muscularis has outer longitudal and inner circular layers

Question 25

large intestine

Answer 25

-cecum, colon, rectum, anal canal
-no villi
-tunica muscularis
-outer longitudinal layers ends at anorectal junction
-inner circular layer continues into anal canal and terminates as internal anal sphincter