For those who are serious about physical training and muscle mass development is important to recognize and differentiate each of these structures, besides knowing their characteristics and limitations to prevent or address potential injuries.

Muscle
A muscle is a body formed by a group of muscle fibers, these fibers are contractile, ie are capable of shortening and elastic which means that they can stretch. Depending on their nature, there are three types of muscle: striated or skeletal, smooth or visceral and heart.

Striated muscles make up the skeletal muscles of the body and are controlled by the will. Unlike smooth muscle contraction is rapid and quickly suffers the effects of fatigue.

Thanks to its adaptability muscles can be changed easily when stunted by disease or disuse reduces its size and strength, but to bring them back to work can reinforce again soon. In simple terms, this is the explanation for muscle growth by training with weights.

Tendon
A biceps tendons is the part of striated muscle that serves as a junction between the muscle belly of the muscle or body, and insertions in the corresponding bone segments. Tendons are milky white, still firm and non-contractile.

There are muscles that have very short tendons, while others have really long tendons. Tendons transmit the force muscle to the bone segments to produce body movement. The image can be seen, marked with yellow boxes, the tendons of the long head of biceps brachii; The remaining muscle tissue would be the belly, which is the thickest part of the muscle.

Ligament
A knee ligament is a band-shaped structure formed by fibrous tissue whose function is to unite and stabilize the bones in joints.

Unlike the tendons that connect muscles to bone, ligaments, bones interconnect adjacent to each other, in a joint, ligaments allow and facilitate movement within the natural anatomical directions, while restricting movements that are anatomically abnormal, preventing injuries or protrusions that might arise from this type of movement.