digestive system

Question 1

mouth

Answer 1

lips help to select the food they eat, teeth are used to break down the food, chewing occurs in a circular pattern

Question 2

chewing

Answer 2

breaks down particle size and causes salivation, saliva has sodium bicarbonate that acts as a buffer for digesta

Question 3

margo plactus

Answer 3

divides the glandular (pH=2-3) and non-glandular regions of the stomach, main area for ulcers

Question 4

stomach

Answer 4

2-3 gallons with limited ability to expand, continuously produces gastric juices and HCl

Question 5

small intestine

Answer 5

composed of the duodenum, jejunum and ileum, liver and pancreas secretions enter into the duodenum, site of absorption for soluble carbohydrates, protein, fat and vitamins and minerals

Question 6

liver

Answer 6

secretes bile continuously, the horse does not have a gallbladder

Question 7

pancreas

Answer 7

secretes enzymes, insulin and buffers

Question 8

cecum

Answer 8

4 ft ling and 7-8 gallons, start of microbial digestion, small amount of water absorption

Question 9

large colon

Answer 9

microbes produce protein, fiber is turned into VFAs, acetate, propionate and butyrate

Question 10

foregut

Answer 10

stomach and SI (35% of GI tract), enzymatic digestion

Question 11

hindgut

Answer 11

cecum, large colon, small colon (65% of GI tract), fermentation, keeps microbes happy, what is not digested in the foregut goes to the hind gut