Final answer:
The cephalic vein is the best vein suitable for venipuncture due to its location and visibility on the surface of the arm.
Step-by-step explanation:
The best vein suitable for venipuncture is the cephalic vein. It begins in the forearm and drains blood from the superficial surface of the arm into the axillary vein. The cephalic vein is easily seen along the surface of the biceps brachii muscle in individuals with good muscle tone and without excessive subcutaneous adipose tissue in the arms.