"Digestive System".

Question 1

• the use of chemicals like acids and enzymes to break food down into smaller molecules

Answer 1

Chemical digestion -

Question 2

the use of physical methods like chewing to break food down into smaller pieces

Question 3

enzymes are necessary for most chemical reactions in our bodies

Answer 3

Enzymes

Question 4

of or relating to nourishment or nutrition

Answer 4

Alimentary