Villi and Microvilli

Question 1

Villi and microvilli

Answer 1

• Increase surface area

Question 2

How small food particles move into blood across the intestinal villus surface?

Answer 2

• Digested food is able to pass into the blood vessels in the wall of the small intestine through the process of diffusion
• Villi- move in swaying and contracting motions
• Diffusion and active transport require energy

Question 3

The flow of blood in villus

Answer 3

• Carry absorbed molecules
• Villus capillaries collect amino acids and simple sugars taken by villi into the bloodstream
• Get nutrients

Question 4

The flow of lymph in villus

Answer 4

• Blood vessels transport proteins and carbohydrates absorbed by the cells of the villi
• The lymphatic capillary removes droplets of emulsifies fat (chyle)
• Glucose goes into lymph

Question 5

Chemical composition of the blood

Answer 5

High oxygen at the start of the villi but decrease
- goes into the cells fore respiration
High carbon dioxide and increases
- cells make CO2 due to respiration as a waste product. Blood picks up CO2
High glucose and increases
High amino acids (come in) and increases
High mineral ions than decreases
High water and increases
- Waste product of respiration goes into blood vessels

Question 6

Where in the alimentary canal does the absorption of the products of digestion occur?

Answer 6

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