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The nail unit consists of the proximal nail fold, nail matrix, nail bed, and hyponychium. These four structures form what is commonly called the nail. 2. The nail unit develops between the 10th and 17th week in utero by a complex pattern of mesenchymal-ectodermal interactions.
1 Σεπ 2015 · The nail is a highly keratinized structure that grows on the dorsal tip of the digit. The nail corresponds to the hoof or claw of other vertebrates, and in higher primates, it has evolved along with the acquisition of manual dexterity [1].
Nail growth Definition of the nail matrix. In the first section we have attempted to define the matrix in anatomical terms, assisted by histology and immunohistochemistry illustrating regional differentiation within the nail unit and in particular with respect to keratin expression.
Among its multiple functions, the nail provides counterpressure to the pulp that is essential to the tactile sensation involving the fingers and to the prevention of the hypertrophy of the distal wall tissue, produced after nail loss of the great toe nail.
29 Ιουλ 2024 · The nail is framed by the lateral nail folds on the left and right side of it. The skin bordering the lower end of the nail is called the proximal nail fold. A thin layer of skin, known as the cuticle, grows over the nail there.
The human nail, the horny covering of the upper surface of the tip of each finger and toe, is a set of complex structures that can most accurately be called the nail unit. The visible nail plate is the ultimate product of the continuous pathway of maturation that...
The nail unit consist of nail matrix, nail folds, nail bed and hyponychium, and any of these parts has a specific composition and functions. Complete regrowth of a fingernail after avulsion can take 4 to 6 months, and up to 1 year for a toenail.
