GENERAL HISTOLOGY

INTEGUMENTERY SYSTEM

INTEGUMENTERY SYSTEM MISCELLENOUS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Fingernails are:
A
a modification of the epidermis
B
derived from osseous tissue
C
extensions of the carpal bones
D
genetically controlled by a delayed action gene
Explanation: 

Detailed explanation-1: -The nail bed, is a specialised form of skin epithelium, and has the same four layers of the epidermis of skin, with the nail plate being analogous to the stratum corneum layer. The nail plate is made up of tightly packed, hard, keratinized epidermal cells.

Detailed explanation-2: -The Squamous Cell Layer Keratinocytes produce keratin, a tough, protective protein that makes up the majority of the structure of the skin, hair, and nails. The squamous cell layer is the thickest layer of the epidermis, and is involved in the transfer of certain substances in and out of the body.

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