Final answer:
The term "pollex" refers to the thumb, which is the first digit of the hand and has two phalanges.
Step-by-step explanation:
The term "pollex" refers specifically to the thumb of the hand, which is digit number 1. The structure of the pollex is slightly different from other fingers, as it contains two phalanges - a proximal phalanx and a distal phalanx. This enables the thumb to perform its essential functions that contribute to the dexterity of the hand, such as grasping objects. This contrasts with the toes of the foot, where digit number 1 is called the hallux or big toe, which similarly has two phalanx bones. The identification of these digits is part of the study of human anatomy, where each bone and joint is given specific names to help in the study and description of the body's structure and functions.