Which muscle is the elbow flexor located on the ventral side of the arm?

• A. Brachialis
• B. Deltoid
• C. Triceps brachii
• D. Biceps femoris

Answer: (A)

Elbow flexion on the front (ventral) side of the arm is produced mainly by the brachialis. This muscle lies on the anterior surface of the upper arm, extending from the lower part of the humerus to the ulna, and it is the primary elbow flexor. The deltoid is a shoulder muscle that helps lift the arm, not bend the elbow. The triceps brachii sits on the back of the arm and extends the elbow. The biceps femoris is a thigh muscle involved in knee movement, not part of the arm. So the brachialis is the best fit for an elbow flexor on the ventral side.