Mechanical and chemical digestion

Mechanical and chemical digestion

How does food become usable for energy?

Mechanical Digestion

• Chewing

• Swallowing

• Muscles squeezing (Peristalsis)

Multiple Select

Which of the following help with mechanical digestion

• Saliva

• Chewing

• Stomach Acid

• Muscular squeezing

  (Peristalsis)

Poll

Which of the following foods is the best in your oppinion?

• Pizza

• Burgers

• French Fries

• Ice cream

• Macaroni and Cheese

Enzymes

• An enzyme is a protein that speeds up a
  chemical reaction.

• Enzymes work in the digestive system

• Amylase breaks down carbohydrates

• Protease breaks down proteins

• Lipase breaks down fats

• Like a key in a lock, enzymes help large
  molecules break into smaller usable pieces

Chemical Digestion

• Enzymes react with food to separate larger chains of molecules

• Saliva in the mouth

• Stomach Acid

• SMALL INTESTINE (enzymes from liver, pancreas, and small intestine)

Multiple Choice

How does chemical digestion work?

• Enzymes from the digestive system react with larger molecules to break them into smaller usable molecules

• Chewing and swallowing food breaks large bites of food into smaller pieces

Absorption

• Amino acids, peptides and glucose are absorbed in the small intestine

• Micro-villi absorb simple molecules and send them to the bloodstream

• The bloodstream delivers the nutritients to the cells for use as energy

• Occurs in SMALL INTESTINE

Fill in the Blank

What does our body use food molecules for once they are delivered to the cells?