What is described as a large flat tendon?

The term that describes a large flat tendon is aponeurosis. Aponeuroses are fibrous sheets of connective tissue that connect muscles to the parts they move, functioning similarly to tendons but broader and flatter in shape. This structure allows for a more extensive attachment surface, facilitating efficient force distribution across multiple muscle fibers.

In contrast, ligaments are connective tissues that primarily connect bones to other bones, while tendons typically connect muscles to bones and tend to be cord-like rather than flat. Fascia refers to a layer of connective tissue that surrounds muscles and organs, providing support and structural integrity without necessarily being associated with muscle attachment as directly as an aponeurosis. Understanding these distinctions is essential for recognizing the specific functions and characteristics of these connective tissues in the body.