Biology Paper 1
Organisation (17 Videos)
The Digestive System
Digestive Enzymes
Effect of Temperature and pH on Enzymes
Required Practical 4: Food Tests
Required Practical 5: Effect of pH on Amylase
Absorption in the Small Intestine
The Heart and Circulation
Arteries, Veins and Capillaries
The Blood
Cardiovascular Diseases
Gas Exchange in the Lungs
Cancer
Communicable and Non-Communicable Disease
Correlating Risk Factors
Lifestyle and Disease
Plant tissues
Transpiration