Book 2, Question 91 · Video
Why Do We Have Fingerprints?
Look closely at your fingertip, and you will see tiny swirly lines. Those ridges form before you are born, and they help you hold things. A grip pattern just for you!
Read the full answer →What Crafty Clover says in this video
Intro
Hey there, curious minds! I'm Crafty Clover! Let's discover something amazing. Why do we have fingerprints?
The Big Idea
Look closely at your fingertip, and you will see tiny swirly lines. Those ridges form before you are born, and they help you hold things. A grip pattern just for you! Scientists think the ridges start forming around the tenth week before birth.
Skin Folds Before Birth
Step one: skin folds before birth. When you were growing inside your parent, the skin on your fingertips began to fold. It happened early, long before you were born. Fingerprints are also on your toes, and on the soles of your feet.
Ridges Form
Step two: ridges form. Those folds turn into tiny raised lines called ridges, that make loops, whorls, and arches. Each finger gets its own swirly pattern. Ridges also help your fingers feel tiny textures.
They Help You Grip
Step three: the ridges help you grip. Like the tread on a shoe, ridges help your fingers hold on to cups, pencils, and branches. And no two people have exactly the same prints. Some fingerprints have a mix of patterns, and some are quite rare.
A Closer Look
Let's take a closer look at a fingerprint! A loop curves back on itself. A whorl swirls in a circle. And an arch rises like a little hill.
Quick Facts
Quick facts! Even identical twins have different prints. Your fingerprints stay the same for your whole life. If your finger gets a small scrape, the pattern grows back. Police and scientists use fingerprints to tell people apart.
Think Like a Scientist
Now, think like a scientist! Make your own fingerprint. Press a fingertip on a washable ink pad or stamp. Press it gently on paper. Look at it with a magnifying glass. Is it a loop, a whorl, or an arch? It is fun to compare prints with friends and family.
Outro
Your fingertips carry a pattern that is truly yours. Science is amazing! Crafty Clover can be found on Amazon Books, Google Bookstore, and Apple Books. Available for purchase or download! Bye for now!