Chemical Energy through digestion

Using the diagram above, determine which structures process food through chemical digestion.

• Stomach (C) and Small Intestine (D)
• Liver (E) and Gallbladder (F)
• Mouth (B) and Pancreas (F)
• Esophagus (A) and Large Intestine (G)

Researchers are investigating processes that happen during digestion. Which answer choice describes only a physical change during digestion?

• Hydrochloric acid in the stomach breaks down proteins.

• Chewing in the mouth breaks food into small pieces.

• Enzymes in saliva start the digestion of starches before food is swallowed.

• Bacteria in the intestines convert dietary fiber into fats.

A student listed how different parts of the bodywork to aid in the digestion of food. Which action is a chemical change that occurs to the food? Explain.

During digestion, which organ is primarily responsible for absorbing nutrients after chemical breakdown?

• Large Intestine

• Esophagus

• Small Intestine

• Stomach

Identify the pictures that represent chemical digestion.