Arthropods have a body divided into head, thorax, and abdomen, more developed nervous systems than annelids, open circulatory systems, Malpighian tubes for excretion, and breathe via trachea.
Arthropods are defined by their head, thorax, and abdomen, possess more nerves than annelids, have an open circulatory system, use Malpighian tubes for waste excretion, and breathe through trachea.
| Front | Arthropods |
|---|---|
| Back | - head, thorax, abdomen - more nerves than annelids - open circulatory system - Malpighian tubes for uric acid - have air ducts called trachea |
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