Select Page

A Level Biology

Exchange and Transport in Animals

Surface Area to Volume Ratio
Gas Exchange in Insects
Gas Exchange in Bony Fish
Gas Exchange in Mammals
Breathing in Humans
Single and Double Circulatory Systems
The Human Circulatory System
Arteries and Arterioles
Structure and Function of Capillaries
The Structure and Function of Veins
Tissue Fluid and Lymph Fluid
Haemoglobin and the Oxygen Dissociation Curve
Haemoglobin and the Bohr Effect
Fetal Haemoglobin
Transport of Carbon Dioxide
The Structure of the Human Heart
Initiation and Coordination of the Action of the Heart
The Cardiac Cycle
Pressure Changes during the Cardiac Cycle
Interpreting an Electrocardiogram
Cardiac Output