 Arthropoda - Scorpion http://www.flightglobal.com/blogs/flight-international/2007/09/scorpions-on-a-plane.html | These organisms have stiff exoskeletons made of chitin. This gives protection and support for the animal. The bodies are divided into segments, which are sometimes fused to form tagmata, integrated body parts. They have highly developed sense organs, especially the eyes. They have an open circulatory system and a complete gut with mouth and anus. Some species have gill, some have trachea, and others have book lungs. They also have a brain. They have a nerve ring aroudn the area of harynx and a double nerve cord. Fertilization occurs internally and female organisms lay eggs. |
