Yr 8 Body Systems - Mechanical and Chemical Digestion

Gastric juices in the stomach digest food into a thick liquid.  This is...

• Mechanical digestion
• Chemical digestion

Tags

NGSS.MS-LS1-7

Enzymes (chemicals) in your saliva help break down food while chewing.  This is...

• Mechanical digestion
• Chemical digestion

Tags

NGSS.MS-LS1-7

The liquid inside the mouth that contains enzymes to begin digestion is called ____________.

• saliva
• salivary glands
• bile

Tags

NGSS.MS-LS1-7

The major function of having enzymes in our digestive system is ______________.

• to eliminate undigested food
• to absorb water in the intestine
• to speed up chemical reactions during digestion

The crushing and mashing of food is what type of digestion?

• Chemical
• Mechanical

The muscles of the stomach mix and churn food you eat.

• True

• False

What starts the process of chemical breakdown?

• Saliva
• Oxygen
• Hydrogen

Type of digestion in the stomach:

• Mechanical

• Chemical

• Both

Chewing food with teeth is an example of a

• physical change
• chemical change

Changes the size, shape, or color of food:

• Physical digestion
• Chemical Digestion