Do Spiders Have Lungs??

Spiders (in the Arachnida class) are feared by humans for their poisonous bites. However, most spiders are quite harmless - denoting their great diverse family of 38,000 known species. Arachnids...

Do Spiders Have Hearts??

Spiders, being over 48,000  species, are an essential section of the earth ecosystem. These arthropods possess the open circulatory system that is, they lack "true blood" or veins to transport...