Regulation of food and dietary supplements by the U.S. Food and Drug Administration whether it is to be regulated as a food or as a drug, based on the claims that the manufacturer or seller makes about its properties. The FDA is authorized to issue a standard of identity for any food. This is a description of what, exactly, must be in that food in order for it to be identified under a certain name. For example, a court has upheld an FDA ruling that for a product to be sold as cream cheese, it must contain a specified minimum percentage of milk fat, and a maximum level of moisture. Incorrectly identifying a
Smallest cardiac veins Smallest cardiac veins The smallest cardiac veins (or Thebesian veins) are minute valveless veins in the walls of all four heart chambers. The veins are sometimes accurately referred to as vessels, but they are frequently confused with a distinct set of artery connections eponymously referred to as the "vessels of Wearn". In his 1928 publication, Wearn himself referred to the arterio-cameral connections (vessels of Wearn) as thebesian. However, Wearn's 1933 and 1941 publications emphatically described the thebesian veins as distinct from arterio-cameral vessels. The thebesian veins are reportedly most abundant in the right atrium and least in the left ventricle.