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Biology Chapter 24.
| Question | Answer |
|---|---|
| charictaristics of arthropods | segemented bodies jointed apendages and exoskeletons |
| thorax | misection of arthropods |
| hard external skeleton on a arthropod | exoskeleton |
| mixed with layers of protiens to make exoskeleton | chitin |
| the three distinct body parts of an arthropods | head,thorax,abdomen |
| abdomen | reproductive segments |
| thorax | fused segments with legs and wings |
| fused segments with antennae, eyes, mouthpiece | head |
| secrete a new layer of chitin then forces fluid between the new and old skeletons. Outer skeleton breaks and organism crawls out | Molting |
| blood flows through the organs | Open circulatory system |
| Ventral nerve cord | brain and ganglia |
| many facets each with its own lens | Compound eyes |
| Gills | for oxygen exchange in aquatic arthropods |
| allow for exchange of oxygen and carbon dioxide through holes in exoskeleton called spiracles | Tracheae |
| organism that remains from 300 million years ago | Horseshoe crab |
| Crustaceans | (class Crustacea ) – live mostly in aquatic environments |
| (class Arachnida) – spiders, scorpions | Arachnids |
| Insects | (class Insecta ) – many insects |
| Myriapods | (class - Myriapoda) – includes centipedes and millipedes |
Created by:
logan18
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