Your body is a walking, talking billboard telling the world how well it's being managed by you. Your waistline, skin tone and even your disposition are all outward signs of just how well you're doing. But there's another marker that is putting some pretty important information out there.
Look down at your hands. Here's what you've got: nail plates — the part you see or what you call your nails, nail beds — the skin beneath the nail plates, cuticles — the tissue that curves around the base of the nail and overlaps slightly, nail folds — the skin that supports and frames the nail on three sides, the lunula — the whitish half-moon shape at the base of your nails, and the matrix — the hidden part of the nail unit, under the cuticle.
As new cells grow in the matrix, the old cells are pushed out, forming what you see as your nail. The nails are composed mostly of keratin, a hardened protein also found in skin and hair. Since shapes and textures can be genetic, your hands may resemble your mother's hands.