Digestive system science

• What is the process of gas turning into a liquid called?

  Evaporation
• What is the process of melting?

  Solid turning into a liquid
• What is the process of freezing?

  Liquid turning into a solid
• What is sublimation?

  Solid turning directly into gas
• Why must nutrients be broken down in our body?

  Most foods are large molecules
• What are the main parts of the digestive system in order?

  1. Mouth
  2. Stomach
  3. Small intestine
  4. Large intestine
  5. Rectum
  6. Anus
• What happens in the mouth during digestion?

  Food is chewed and mixed with saliva
• What role do teeth play in digestion?

  They help break food into smaller pieces
• What occurs in the large intestine?

  Water is absorbed back into the body
• What is feces?

  Solid waste left after digestion
• What is the pH level of the stomach?

  pH 1-2
• What is the function of the stomach in digestion?

  Food is mixed with digestive acids
• Where are feces stored before leaving the body?

  Rectum
• What happens in the small intestine?

  Nutrients pass through the intestine wall
• What is the function of the anus?

  Muscular ring that expels waste
• What is the order of food passage through the digestive system?

  Mouth, stomach, small intestine, large intestine
• What is the role of saliva in digestion?

  It helps to mix and break down food
• Why is the rectum important in the digestive system?

  It stores feces until elimination
• How does the anus function in the digestive process?


  It allows waste to exit the body