You need to enable JavaScript to run this app.
Cambridge IGCSE - Biology
Alternative to Practical
Alternative to Practical Skills
Characteristics and Classification of Living Organisms
Characteristics of Living Organisms
Concept and Use of a Classification System
Concept and Use of Classification System
Features of Organisms
Features of Organisms
Dichotomous Keys
Organisation of the Organism
Cell Structure and Organisation
Levels of Organisation
Size of Specimens
Movement into and out of Cells
Diffusion
Osmosis
Active Transport
Biological Molecules
Biological Molecules
Enzymes
Enzymes
Plant Nutrition
Photosynthesis
Leaf Structure
Mineral Requirements
Human Nutrition
Diet
Digestive System
Physical Digestion
Chemical Digestion
Absorption
Transport in Plants
Xylem and Phloem
Water Uptake
Transpiration
Transpiration
Translocation
Transport in Animals
Circulatory Systems
Heart
Blood Vessels
Blood
Diseases and Immunity
Diseases and Immunity
Diseases and Immunity
Gas Exchange in Humans
Gas Exchange in Humans
Respiration
Respiration
Aerobic Respiration
Aerobic Respiration
Anaerobic Respiration
Anaerobic Respiration
Excretion in Humans
Excretion in Humans
Excretion in Humans
Coordination and Response
Coordination and Response
Sense Organs
Hormones in Humans
Homeostasis
Homeostasis
Tropic Responses
Drugs
Drugs
Medicinal Drugs
Misused Drugs
Reproduction
Asexual Reproduction
Asexual Reproduction
Sexual Reproduction
Sexual Reproduction
Sexual Reproduction in Plants
Sexual Reproduction in Humans
Sexual Hormones in Humans
Methods of Birth Control in Humans
Sexually Transmitted Infections
Inheritance
Inheritance
Inheritance
Chromosomes, Genes and Proteins
Mitosis
Meiosis
Monohybrid Inheritance
Monohybrid Inheritance
Variation and Selection
Variation
Variation
Adaptive Features
Adaptive Features
Selection
Selection
Organisms and their Environment
Energy Flow
Food Chains and Food Webs
Nutrient Cycles
Populations
Human Influences on Ecosystems
Food Supply
Habitat Destruction
Habitat Destruction
Pollution
Pollution
Conservation
Biotechnology and Genetic Modification
Biotechnology and Genetic Modification
Biotechnology
Biotechnology
Genetic Modification
Diagnostic Challenge
Assessment 1
Assessment
P2 General Assessment
P4 General Assessment
Gas Exchange in Humans
Gas Exchange in Humans
Attempt a Quiz
24 Pages
Gas Exchange
in Humans
Chapter 11
