1.8K views · 32 reactions | What is tricep vs biceps? The biceps tendons attach the muscle to the bones in the shoulder and elbow. The triceps muscle is located at the back of your upper arm and allows you to extend your arm. The triceps tendons attach the muscle to the elbow as well as the shoulder blade (scapula) and upper arm bone. The main function of the triceps is the extension of the elbow joint. | Dee Jackson | Facebook