Resultados para "Tooth" en Ciencia y tecnología

Open wide! Compare your teeth to those of other animals and find out why teeth come in so many different shapes and sizes. What animal would you be if a few of your teeth grew so long that they stuck out of your mouth even when it was closed? What would you be if your top canine teeth grew almost all the way down to your feet? This book will keep you guessing as you hear about how human teeth are like—and unlike—those of other animals.

Marine mammals known as cetaceans are broken into two large groups: toothed whales (including dolphins and porpoises) and baleen whales. One group has a single blowhole to breathe air, the other has two. One group has tall dorsal fins to help maintain balance as they chase prey. The other scoops up water and prey in their large mouths as they swim slowly along—they don’t need large dorsal fins. One group uses echolocation, the other doesn’t. Learn more about what these animals have in common and how they are different in this latest installment of the Compare and Contrast Series.

What if the neighborhood cat had teeth that measured a foot long? Saber-tooth cats have been extinct for thousands of years, but once upon a time they were the predators of their neighborhoods. Learn more about the different types of these ancient felines with critical thinking questions and more.

Did you know your teeth are the hardest thing in your body? Your tooth has many parts that protect it and keep it strong. How do cavities form? Learn how brushing and flossing can keep plaque from forming which helps prevent cavities.