digestive system

Question 1

the four stages of digestion are:

Answer 1

ingestion
digestion
absorption
elimination

Question 2

Mouth:

Answer 2

• Saliva helps to transform the complex molecules in carbohydrates into simpler molecules
  (chemical transformation).

{saliva breaks down carbs}

-while you masticate (chew) and break down the food into smaller pieces with your teeth (physical transformation).

Question 3

Esophagus:

Answer 3

It moves food from the back of your throat to your stomach through muscle contractions called peristalsis (physical transformation).

Question 4

Stomach:

Answer 4

-stores the food, breaks down the larger molecules and empties the liquid mixture into the small intestines (physical transformation).

• Gastric juices that come from the glands along the
  stomach’s walls help to break down proteins (chemical transformation).

{stomach breaks down proteins.}

Question 5

Small Intestine:

Answer 5

• villi increase the surface area through which various
  nutrients can be absorbed into the bloodstream.
• the intestinal glands secrete intestinal juices that transform proteins into amino acids and fats into smaller molecules like glycerol (chemical transformations).
• The liver (gland) secretes bile which is stored in the gall
  bladder and emulsifies fats (physical transformation).
• The pancreas secretes pancreatic juices that break down carbohydrates into smaller molecules of glucose (chemical transformation).
• The small intestine also churns and moves the food along through peristalsis (physical transformation).

Question 6

Large Intestine:

Answer 6

This is where most water, vitamins and minerals are absorbed into the bloodstream. Removing water from a liquid mixture transforms it into solid waste that is later
expelled through the anus (physical transformation).