Has an animal saved your life? Studying Arctic birds helped resuscitate those suffering from hypothermia. An ECG on the 150kg heart of a humpback whale has extended the lives of patients with heart failure. Understanding giraffes' long necks has led to improved asthma treatment. Learning how animals survive and thrive has led to life-saving advances for human health. But we still have a long way to go.

Intensive care doctor Matt Morgan looks at why animals can be the key to understanding how our bodies work - and how to fix them when they go wrong.