We just learned a little about Spider Lungs.
Spiders have hearts up along the back side of their lower body, on the part called their abdomen.
Spiders don't have normal blood like we do, they have something called hemolymph.
It's kind of like our blood, but it's a blue or grey color instead of red, and it has different kinds of nutrients in it.
Our heart pumps blood to all the parts of our body in tubes called veins and arteries.
Spiders have a heart and some smaller tubes for their hemolymph, but mostly they just help dump it out on all the inside parts of the spider's body.
(from: wikipedia - chelicerata)
Kid Facts - Blast from the past: Electric Eel
