1. Spiders
... that set the class arachnida apart from the class insecta. The first and most obvious difference is that arachnids have eight legs and only two body segments. Insects have six legs and three body segments. The upper segment of arachnids, called the cephalothorax, contains the mouth, head, and six pairs ... is either pincers or poison fangs. The second pair can also be used as pincers, but are usually feelers. The last two pairs are legs. The second segment, or abdomen, contains all the internal and external organs, such as the spinnerets found on spiders that allows them to produce ... ...
- Word Count: 2262
- Approx Pages: 9
- Has Bibliography
- Grade Level: High School