Final answer:
A healthy nail bed is pink due to the presence of capillaries in the dermis. It serves as an indicator of oxygen saturation and blood flow.
Step-by-step explanation:
A healthy nail bed is expected to appear pink. The pink color is due to the presence of capillaries in the dermis. The nail bed is the area of skin under the nail plate, and it serves as an indicator of oxygen saturation and blood flow in the body.