Arachnida Structure and Function
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- Only two body divisions
- Cephalo-thorax
- Abdomen
- Three pairs of legs in the larval stages or four pairs of legs during the nymphal and adult stages
- No wings
- No antennae
- No compound eyes
- Small size
- E.g. Ticks are under 1cm in length
- E.g. Mites are under 1mm in length