Lesson 1
Inside a taste bud
Stick out your tongue and look in a mirror. See the little bumps? Those are not taste buds! The tiny taste buds are hidden in and around those bumps.
Each taste bud is shaped a bit like a tiny onion. Inside are about 50 to 100 taste cells. A tiny hole on top, called the taste pore, lets bits of food in.
Wow!You have thousands of taste buds. Most are on your tongue, but some are on the roof of your mouth and in your throat too!
Lesson 2
Sweet, salty, sour, bitter, savory
Taste cells can sense five main tastes:
- Sweet, like fruit
- Salty, like crackers
- Sour, like lemons
- Bitter, like dark chocolate
- Savory (also called umami), like cheese or soup
When food touches a taste cell, it sends a signal along a nerve to your brain. Every part of your tongue can sense all five tastes.
Try thisScroll up to the 3D model and press Taste it!, then Send to brain.
Lesson 3
Your nose helps you taste
Much of what we call flavor actually comes from your nose! Smells from food drift up to your smell cells, and your brain mixes them with taste.
Try thisWith a grown-up, hold your nose and eat a jelly bean or a piece of fruit. Then let go. Does the flavor suddenly get stronger?
Wow!Taste cells wear out fast, so your body replaces them about every 1 to 2 weeks. That's why a burned tongue gets better quickly!