Fatty Acid Biosynthesis in Aorta and Heart1,2 1The survey of the literature pertaining to this review was concluded in July, 1969. The only exceptions to this were the author's publications that were in press at the time and the paper of Majerus and Kilburn (1969), which had been presented in part at the Gordon Research Conference on Lipid Metabolism, Meriden, New Hampshire, June, 1969. 2This work was supported by Grant-in-Aid 65-G-15 from the American Heart Association and Grants HE 08805 and HE 05239 from the United States Public Health Service.