Interactions with the environment

This video describes the interaction of FSH, LS, oestrogen and progesterone in the menstrual cycle.

Matt Green explains how vaccinations combat diseases caused by pathogens.

Sophie Ward explores the effects of different types of disease

Sophie Ward explains how the immune system defends the body from disease.

James Stewart explains the three different types of radioactive decay.

Dr George Dransfield explains the difference between contamination and irradiation.