required to write a fully referenced 2500 word (+/-250 words) essay on the development of an organ of your choice. The essay should include an introduction outlining the descriptive embryology of the structure. The body of the essay should focus on the molecular and genetic mechanisms underlying the development of the structure, or a particular aspect of its development. How failure of this genetic regulation may result in human congenital disorders should also be discussed where appropriate. The essay must refer to current scientific literature and should not rely solely on textbooks.