The biceps, or biceps brachii, is a large muscle located on the front of the upper arm between the shoulder and the elbow

. It has two heads-a long head and a short head-that originate from different points on the scapula (shoulder blade) and join to form a single muscle belly that attaches to the forearm

. The primary functions of the biceps are:

• Flexion of the elbow, which means bending the arm to bring the forearm closer to the upper arm
• Supination of the forearm, which means rotating the forearm so the palm faces upward or forward
• Assisting in shoulder elevation and stability

The biceps muscle is involved in everyday activities such as lifting, carrying, twisting the forearm, and fine motor tasks. It crosses both the shoulder and elbow joints, making it unique in its range of motion and function

. In summary, the biceps is a two-headed muscle on the front of the upper arm responsible mainly for bending the elbow and rotating the forearm, playing a crucial role in arm movement and strength