Fingernails are important because they protect the sensitive tips of our fingers and toes. Their hard, keratin surface acts as a shield against injury. Beyond protection, they also enhance dexterity, aiding in tasks like scratching or picking up small objects.
The Protective Role of Fingernails
The most significant function of fingernails is protection. The hard keratin layer provides a barrier against:
- Physical trauma: Impacts, scrapes, and other minor injuries are lessened by the nail's tough structure. This protects the underlying soft tissues from damage.
- Infection: The nail acts as a physical barrier, helping to prevent germs from entering the body through the delicate fingertip skin.
Fingernails and Dexterity
While primarily protective, fingernails also contribute to our dexterity and fine motor skills. They help with:
- Precision grip: The slight curvature and firmness of the nail allow for better manipulation of small objects. Think about picking up a tiny screw or threading a needle.
- Scratching: Fingernails are naturally suited for removing irritants from the skin, such as itchy tags or embedded particles.
The Composition of Fingernails
Fingernails are primarily composed of keratin, a strong protein also found in hair and skin. This explains their hardness and resilience. The hard surface of the nail is what allows it to perform its protective functions effectively.
In summary: Fingernails are essential for protecting the sensitive tips of our fingers and toes, and also contribute to dexterity and fine motor control. The keratin composition gives them the necessary strength and durability to fulfil these roles.
