Insect breath

Stem cells and regenerative medicine

Our bodies make 2 million new red blood cells every second. Sometimes this process is defective, or blood is lost through injury more quickly than it can be replaced, and so a blood transfusion is required. Stem cell biologist Angela McCahill explores how using stem cells could meet the increasing demand for transfusable blood

Cell division
Biological Sciences Review
Cells
Disease and the immune system
Mass transport in animals and plants
Organisms exchange substances with their environment
Studying cells
The control of gene expression
Transcription and translation
Ethics