Final answer:
The most superficial mechanoreceptor in the human body is Meissner's corpuscle, which is responsible for sensing light touch and low-frequency vibration.
Step-by-step explanation:
The most superficial mechanoreceptor in the human body is Meissner's corpuscle. Merkel's disks, while associated with light touch and located in the upper layers of skin near the base of the epidermis, are not the most superficial. Meissner's corpuscles are found toward the surface of the skin, mainly in regions such as the fingertips and are responsible for sensing light touch and low-frequency vibration. They are encapsulated nerve endings that are particularly sensitive and have small, well-defined receptive fields which make them capable of pinpointing the location of stimuli, providing the discriminatory touch necessary for tasks like reading Braille or feeling the texture of objects.