In Science Marlo, Konrad, and Oni have been studying the muscular system. Part of that is tendons. We learned about them from Wikipedia.
The structure is:
It’s shaped like gum so it can move with the muscle and the bones.
Tendons have been traditionally considered to simply be a mechanism by which muscles connect to bone, functioning simply to transmit forces. This connection allows tendons to passively modulate forces during locomotion, providing additional stability with no active work. However, over the past two decades, much research focused on the elastic properties of some tendons and their ability to function as springs.