Chapter 33, Problem 11STP

Summary Introduction

To analyze:

The types of animals whose teeth resemble human teeth.

Introduction:

Over 40,000 species of spiders are found in this world, they are found in homes, buildings, and forests. Some of the spider species adapted the condition in human dwellings and this makes them dependent and they no longer survive outside. Spiders are arthropod predators and are involved in controlling insects inside the house. They consist of venom- injecting fangs that can pierce human skin by damaging the tissue.

Explanation of Solution

Spiders have two body regions; cephalothorax and abdomen and have eight limbs that help them to walk. The exact feeding strategies of spiders are not known, but they predigest the prey by injecting or covering the prey with the digestive fluids they produce inside their mouth. After the pre-digestion process, they consume the liquefied meal. But other familiar arthropods like cockroaches begin the digestion from their mouth by chewing the food with the help of mandibles and maxillae. They have a separate digestive system that is involved in the digestion of food.

Conclusion

Thus, it is concluded that spiders cover the prey with the digestive fluids they produce inside their mouth. After the pre-digestion process, they consume the liquefied meal.