What is hamburger meat made from?

Hamburger meat is typically made from ground beef, which is derived from the skeletal muscle of cattle. It can be made from various cuts of beef, including chuck, round, loin, and flank. These cuts are trimmed of excess fat and then ground together to create a uniform texture. Some hamburger meat may also contain trimmings from other parts of the cow, such as the heart, liver, and tongue. It's worth noting that in some regions, hamburger meat can also be made from other meats, such as pork, turkey, or lamb.