Concept explainers
To discuss: The important distinguishing features of arthropods.
Introduction: Arthropods are the protostomes and belong to the ecdysozoan branch. More than ¾ of all known species belong to this group. Arthropods have specific features that allow them to inhabit a wide range of habitat.
Explanation of Solution
Arthropods are bilaterally symmetrical, triploblastic organisms with an organ system level of body plan. They have a complete digestive tube. Presence of a segmented body, a hard exoskeleton composed of chitin and protein, and the paired jointed appendages are the characteristic features of arthropods. The appendages are modified for various functions such as swimming paddles, walking legs, mouthparts, and sensory organs.
The nervous system consists of a brain and ventral nerve cord with ganglia. Some arthropods such as insects and many crustaceans have compound eyes composed of many light-sensitive units called ommatidia. Arthropods have an open circulatory system and a dorsal, tubular heart. Arthropods have gills, tracheae, or book lungs for breathing. They have a complete
Want to see more full solutions like this?
Chapter 19 Solutions
INTEG.PRIN.OF ZOOLOGY-EBOOK CODE
- How are the main classes of arthropods classified according to the presence of larval stage in their embryonic development?arrow_forwardWhy are arthropods important and How arthropods affect human health?arrow_forwardWhat phylum is considered to be the arthropod's closest relative? What major characteristics do arthropods share with this sister group?arrow_forward
- What are the distinguish traits of Arthropods that allow them to be extremely successful?arrow_forwarda) What is the unique characteristic of the prawn? b) State the organ that helps prawn swim. c) What is the process of shedding of chitinous covering by arthropods during growth? d) Why barnacles are classified under crustacean phylum? e) Crustaceans have hard, jointed external skeleton, called anarrow_forwardWhat are Arachnids ?arrow_forward
- Biology: The Dynamic Science (MindTap Course List)BiologyISBN:9781305389892Author:Peter J. Russell, Paul E. Hertz, Beverly McMillanPublisher:Cengage Learning