Answer:
–Nail, in construction and carpentry, a slender metal shaft that is pointed at one end and flattened at the other end and is used for fastening one or more objects to each other. Nails are most commonly used to fasten pieces of wood together, but they are also used with plastic, drywall, masonry, and concrete
–The short answer is we have evolved to have nails because they help us pick things up (like food), pick things off (like bugs), and hold tightly onto things. Early humans who had these type of nails (instead of claws) tended to live long enough to have babies and pass on the fingernails gene to their kids.
Explanation:
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Answer:
Strengthening. The hard, outer covering on the tips of the fingernails makes the fingertips one of the strongest parts of the hand. This makes performing everyday tasks, including gripping, less risky. The fingernails have many small blood vesselsTrusted Source to supply them, and can maintain their blood flow even when you’re gripping something very tightly.
Protection. Having a fingernail covering can prevent viruses and bacteria from entering the body. If a person’s nail bed is disrupted, they may be more at risk for nail infections.
Enhancing fine motor movements. The fingernails enhance your ability to scratch and separate, such as pages in a book or hairs on your head. A person can also use their fingernails to pick up items.
Sensation. While you may not think of the nails as being as sensitive as your fingertips, there’s an intricate network of nerves underneath the nail.
