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==Overview==
[[Image:Tyranid-CapillaryTowers1.jpg|thumb|right|300px|Tyranid feeding system; capillary towers and bioship feeding tubes.{{Fn|3}}{{Fn|8}}{{Fn|7a}}]]
These stationary Tyranid bioforms may appear like plant-analogues, but they are just as aggressive as their more mobile bioforms. The towers extend tendrils that will absorb any flora or fauna that lack the ability to quickly exit the capillary tower's vicinity. They simultaneously filter the world's atmosphere, absorbing any microbes, flying fauna, or other organic matter to be gathered.{{Fn|2b}}
[[Image:40k-270-command-tower.jpg|thumb|right|Capillary towers funnel biomass to the [[Hive Ships]] waiting in orbit.{{Fn|7a}}]]
Capillary towers can grow to reach the upper atmosphere (and beyond). Where they grow, [[Reclamation Pool]]s then start to appear. The towers are linked to them via underground roots. Later, the towers link up with the sucking proboscis feeding tubes of hive ships in low orbit, which then pump the biomass upwards and distribute it to the waiting [[bioship|biovessels]].{{Fn|1}}
