(BIOLOGY) Absorption

• Where are food molecules absorbed in the body?

  small intestine
• What happens to large food molecules so that they can be absorbed?

  are broken down by digestive enzymes into smaller , soluble molecules
• what is the role of villi?

  increases the surface area of the small intestine for absorption of nutrients
• What are the three key features of villi that make them effective at absorbing Nutrients?

  1.A thin outer layer of cells 2.A good blood supply 3. A large surface area
• What four roles do bacteria play in digestive system?

  1.Produce digestive enzymes 2.produce useful vitamins 3.produce useful hormones 4.prevent the growth of harmful bacteria
• What is the role of digestive enzymes in the small intestine?

  break down large food molecules into smaller, soluble molecules that can be absorbed
• What vitamins are produced by bacteria in the digestive system?

  vitamin K