What is the fibrous connective tissue that is tough, flexible, and inelastic and attaches muscles to bones called?

Fibrous connective tissue is a type of connective tissue that supports and structures various body parts. It is found in tendons, ligaments, and fascia and contains collagen fibres and fibroblasts.

Tendons are connective tissues that connect muscle to bone. They transfer the force produced by muscle contraction to the bones, allowing movement. 

Tendons are strong, but flexible, and can withstand high levels of tension. Tendons in the body help us move, lift, and grasp.