Final answer:
The slightly raised tunnel in the epidermis commonly found in the finger webs and on the sides of the fingers is called the carpal tunnel.
Step-by-step explanation:
The slightly raised tunnel in the epidermis that is commonly found in the finger webs and on the sides of the fingers is called the carpal tunnel. It is formed by the carpal bones and the flexor retinaculum, which is a strong ligament that spans the top of the U-shaped grouping of the carpal bones.
Carpal tunnel syndrome can occur when there is inflammation and swelling within the carpal tunnel, compressing the nerve that passes through it. This can result in pain, numbness, and muscle weakness in the areas of the hand supplied by this nerve.