Martin Flack
![](http://upload.wikimedia.org/wikipedia/commons/thumb/3/38/Portrait_of_Martin_William_Flack_Wellcome_L0011820.jpg/220px-Portrait_of_Martin_William_Flack_Wellcome_L0011820.jpg)
Martin William Flack CBE (20 March 1882 – 16 August 1931) was a British physiologist who co-discovered the sinoatrial node with Sir Arthur Keith in 1907.[1]
Flack later became demonstrator of physiology at the London Hospital and later a lecturer. He served on the Medical Research Council and became the director of medical research for the Royal Air Force. He was appointed a Commander of the Order of the British Empire in the 1919 New Year Honours.[2]
Selected publications
- A Textbook of Physiology (1919)