What type of tissue is the nail made of?

• A. Connective tissue
• B. Keratinized epithelial tissue
• C. Nervous tissue
• D. Muscle tissue

Answer: (B)

The nail is primarily composed of keratinized epithelial tissue, which plays a crucial role in its structure and function. This type of tissue consists of keratin, a fibrous protein that offers strength and durability, making nails resistant to damage. As nails grow, they are formed by keratinocytes, which proliferate and undergo keratinization, resulting in the hard, protective covering characteristic of nails.

Unlike connective, nervous, or muscle tissues, keratinized epithelial tissue is specifically designed for protective purposes. Connective tissue supports and binds other tissues together, nervous tissue is involved in transmitting signals, and muscle tissue facilitates movement. The unique properties of keratinized epithelial tissue allow nails to serve their essential functions, such as protecting the distal phalanx, enhancing sensitivity in the fingertips, and aiding in the grasping of objects.