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Revision notes
IGCSE
Biology
Edexcel IGCSE
Higher
Villi

Villi

Biology: Edexcel IGCSE, topic 2.3.16

Test yourself on Villi

Which of these are true of villi?
Which of these is absorbed into the lacteals of villi?

Practise this topic for free

Previous topic2.3.15 Peristalsis Next topic2.3.17 Digestive Enzymes

Biology: Edexcel IGCSE contents

1 The Nature & Variety of Living Organisms
- 1.1 Characteristics of Living Organisms
  1.1.1 MRS GRENC
  1.1.2 M.R.S.
  1.1.3 G.R.E.N.C.
- 1.2 Variety of Living Organisms
  1.2.1 Types of Cells
  1.2.2 Properties of Prokaryotes
  1.2.3 Structure of Eukaryotic Cells
  1.2.4 Organisms: Animals & Plants
  1.2.5 Other Kingdoms
  1.2.6 Pathogens
  1.2.7 Viruses
2 Structure & Functions in Living Organisms
3 Organism Functions
4 Reproduction & Inheritance
5 Ecology
- 5.1 Ecosystems
  5.1.1 Ecosystems
  5.1.2 Resources
  5.1.3 Interdependence
  5.1.4 Growth Factors
  5.1.5 Assessing Ecosystems
  5.1.6 Quadrats
  5.1.7 Required Practical
  5.1.8 Exam-Style Questions - Sampling
  5.1.9 Energy Flow
  5.1.10 Food Chains
  5.1.11 Trophic Levels
  5.1.12 Decomposers
  5.1.13 Pyramids of Biomass
  5.1.14 Transfer of Biomass
  5.1.15 Reasons for Wastage
  5.1.16 End of Topic Test - Food and Trophic Levels
  5.1.17 Recycling Materials
  5.1.18 Carbon Cycle
  5.1.19 Exam-Style Questions - Carbon Cycle
  5.1.20 Nitrogen Cycle
  5.1.21 The Nitrogen Cycle and Microorganisms
  5.1.22 End of Topic Test - Ecosystems
  5.1.23 Grade 9 - Ecosystems
- 5.2 Human Impacts
  5.2.1 Waste Management
  5.2.2 Eutrophication
  5.2.3 Air Pollution
  5.2.4 Deforestation
  5.2.5 The Greenhouse Effect
  5.2.6 Greenhouse Gases
  5.2.7 Global Warming
  5.2.8 End of Topic Test - Human Impacts
  5.2.9 Exam-Style Questions - Air Pollution
6 Biological Resources
- 6.1 Food Production
  6.1.1 Intensive Farming - Crop Yield
  6.1.2 Intensive Farming - Ion Deficiency
  6.1.3 Intensive Farming - Pest Control
  6.1.4 Intensive Farming - Fish Farming
  6.1.5 Microorganisms in Food
  6.1.6 Factors Affecting Microorganism Growth
  6.1.7 Industrial Fermentation
  6.1.8 Selective Breeding
  6.1.9 Selective Breeding Process
  6.1.10 Uses of Selective Breeding
  6.1.11 Exam-Style Questions - Selective Breeding
- 6.2 Genetic Engineering
  6.2.1 Genetic Engineering
  6.2.2 Uses of Genetic Engineering
  6.2.3 Producing Human Proteins in Bacteria
  6.2.4 Tissue Culture
  6.2.5 Uses of Tissue Culture
  6.2.6 Artificial Animal Cloning
  6.2.7 Exam-Style Questions - Mitosis & Cloning

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