Chapter 4: Functions of the Digestive System Flashcards
What does the food in the pharynx stimulates?
The swallowing reflex.
During swallowing the Larynx is pulled upward to meet what?
To meet the epiglottis and seal off the trachea.
Food goes from the Pharynx to what?
To the Esophagus.
The food moves down the esophagus by what?
By peristalsis.
When does the food enters the stomach?
When the peristaltic wave reaches the esophageal sphincter.
The unique muscular structure of the stomach breaks up the food into small pieces called?
Chyme (K-im)
Chyme exits through the pyloric sphincter into what?
Into the duodenum of the small intestine.
Where does the major portion of absorption and digestion occurs?
In the Small Intestine.
What supplements the mucosa after it secrets enzymes?
The digestive enzymes of the pancreas and the liver.
The walls of the Small Intestine are cover with what?
With Villi.
Where does the nutrient absorption takes place?
In the walls of the Small Intestines that are covered with Villi.
What does the structure of each Villus contain?
A capillary and lacteal to pick up the digested nutrients.
What happens to the nutrients after they are absorbed by the Villi?
They are transported by blood to all cells of the body.
What happens to the undigested food?
It reaches the ileo-cecal valve and enters the large intestine (colon).
What does the Colon do?
Absorbs water, manufactures vitamins, produces mucous, forms and expels feces.
