Essay on Arthropod and Jointed Foot

Submitted By Joelle-Smeltz

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Pages: 2

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Complete the following questions, in complete sentences, using the provided web sites.
1. What are six characteristics shared by arthropods? Segmented bodies, an exoskeleton of chitin, jointed appendages, an open circulatory system with a hemocoel, and a dorsal brain and a ventral nerve cord.

2. What does the term arthropod mean? Arthropod means jointed foot.

3. Describe the exoskeleton of arthropods. The exoskeleton of arthropods is made of chitin, usually also hardened with protein sclerotin.

4. What process must all arthropods undergo for growth? Explain the process. In order to grow, arthropods must periodically molt -- a process that entails shedding their exoskeleton and inflating their body before the new skeleton hardens.

5. Print out and label a picture of a crayfish. You must include and external and an internal view.

6. Define the following terms:

Antennules: A small antenna, especially one of the foremost pair of a crustacean.

Antennae: One of the jointed, movable, sensory appendages occurring in pairs on the heads of insects and most other arthropods.

Mandibles: One of the first pair of mouthpart appendages, typically a jaw like biting organ, but styliform or setiform in piercing and sucking species.

Maxillae: One of the paired appendages immediately behind the mandibles of arthropods.

Maxillipeds: One member of the three pairs of appendages situated immediately behind the maxillae of crustaceans.
Chelipeds: Either of the pair of appendages bearing a chela.

Walking Legs: The arthropod leg is a form of jointed appendage of arthropods, usually used

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