Corals are made up of tiny animals known as polyps. Each of the polyps has a skeleton cup, tentacles with stinging cells, a mouth and a stomach. Algae grow in the stomach lining and supply calcium which the polyp uses to build the skeleton cup. Here's a neat model of a coral polyp your students can make.
Chewing lice are not as common as fleas and ticks, but just as itchy and annoying. Learn about the different types of lice out there and how to protect your pets. While lice may not be as common as fleas, they can still cause aggravation in some animals, especially animals who are very young, old, or sick. There are two types of lice that affect cats and dogs: sucking lice (which suck blood) and chewing lice. Chewing lice are tiny, flat, wingless insects that feed on the dead skin of pets.
Cats and dogs can get lice â does this situation mean that your pet can infect your child? Well, you need not fret as while can occasionally get lice; your child will not be able to catch lice from your pet. Why? Simply put dog lice require dog blood to survive, and cat lice require only cat blood to survive. In other words then, pet lice cannot survive on human blood. Along similar lines, your cat or dog cannot catch lice from an infected child as the head lice do require human blood to live. It also important to remember that human lice are not a result of poor personal hygiene habits.