f99a56df_Intertabrae_Chart__7
[0] Arthropoda [1] Open system with a dordal heart and sinuses [2] Gills, Tracheal system, book lungs [3] see Annelida [4] Sexual: hermaphroditic, seperate sexes, some parthenogenic [5] Malpighian tubules, green glands [6] Anterior brain and a ventral nerve cord [8] Complex muscular system. [7] 
Exoskeleton made of chitin
S k e l e t a l
S p i c u l e s
N o n e
S o m e c o n t a i n s h e l l s
E x o s k e l e t o n m a d e o f c h i t i n
Intertabrae Chart
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