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Spiders obtain their oxygen through four respiratory organs located on the underside of their abdomens. These organs are arranged into two pairs, an anterior pair at the very front end of the abdomen, and a posterior pair behind the anterior pair.
Depending on the species, some spiders have lungs, and some don't. There are two types of respiratory systems in spiders: trachea and book lungs. Most spiders have both, but some have only one or the other.Trachea are simple tubes that connect internal tissue to the outside air, and oxygen moves in through simple diffusion.ost spiders have both, but some have only one or the other. Trachea are simple tubes that connect internal tissue to the outside air, and oxygen moves in through simple diffusion.