Final answer:
The thumb contains a saddle joint that allows for precise gripping and fine motor skills in the hand.
Step-by-step explanation:
The subject of this question is Biology, particularly related to the structure and function of the hand. The thumb contains a saddle joint, which is the only one of its kind in the body. This joint allows the thumb to move in a variety of directions, opposing the fingers and enabling us to grasp objects with precision.
If the thumb did not have a saddle joint, the hand would not be able to grip objects as effectively. The ability to oppose the thumb to the other fingers offers a wide range of motion and strength. Without this unique joint, our hands would have limited dexterity and fine motor skills.
Learn more about Structure and function of the thumb joint in the hand