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biceps brachii
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An anatomical illustration of the human upper limb and chest from the front, showing labeled muscles such as the deltoid, pectoralis major, biceps, triceps, and serratus anterior, along with the cephalic vein and thoracoacromial artery. Illustration of the human forearm from an anterior view, showing the superficial layer of muscles, tendons, and ligaments. Major structures including the biceps brachii, brachialis, pronator teres, flexor carpi radialis, and palmaris longus muscles are labeled, along with nerves and arteries such as the median nerve and radial artery. Detailed anatomical illustration of the human upper arm from the front, showing the superficial muscles, major nerves, and tendons. Key structures like the deltoid, biceps brachii, brachialis, and associated nerves are labeled.
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biceps brachii

anatomy
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An anatomical illustration of the human upper limb and chest from the front, showing labeled muscles such as the deltoid, pectoralis major, biceps, triceps, and serratus anterior, along with the cephalic vein and thoracoacromial artery.
muscles of the shoulder; human muscle system Muscles of the shoulder.

The biceps brachii is a prominent muscle located on the front of the upper arm. It has two heads, meaning it originates from two points: the coracoid process of the scapula (shoulder blade) and the upper glenoid cavity of the shoulder joint. The tendon of the biceps brachii attaches to a bone in the forearm called the radius.1

This muscle plays a key role in movement. Its primary functions include bending the forearm towards the upper arm, which is essential for lifting and pulling actions. It also helps to supinate the forearm, turning the palm forward or upward. The biceps brachii works in conjunction with other muscles, such as the brachialis and brachioradialis, to flex the forearm. The size of this muscle is often seen as a symbol of physical strength.12

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2 Britannica Sources
  1. human muscle system - The arm
  2. biceps muscle

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