GENERAL HISTOLOGY

Detailed explanation-1: -The lunula is the visible portion of the distal nail matrix that extends beyond the proximal nailfold. It is white, half-moon-shaped, appears by week 14 of gestation, has unique histologic features. The lunula has a primary structural role in defining the free edge of the distal nail plate.

Detailed explanation-2: -Most nails have a white half-moon shape at the base, just above the cuticle, called a lunula.

Detailed explanation-3: -In some people it barely protrudes and is only really visible on the thumb and big toe. The lunula looks white because the epidermis is thicker beneath the matrix and it blocks the pink colour from the blood vessels below.