Do spiders have hearts?
Best Answers
Spiders have hearts located dorsally on the abdomen. The heart is translucent, but appears black here because it is strongly contrasted with the yellow acid crystals that give the spider her opaque appearance. read more
Spiders, like most arthropods, have an open circulatory system, i.e., they do not have true blood, or veins to convey it. Rather, their bodies are filled with haemolymph, which is pumped through arteries by a heart into spaces called sinuses surrounding their internal organs. read more
Insects and arachnids have a very simple heart, which is really just a section of a vessel surrounded by muscle fibers that can contract to squeeze the vessel rhythmically. It has no chambers or valves like the hearts of higher animals. read more
