The post Do Insects Have Blood? Guide to Bug’s Hemolymph & Circulatory System first appeared on My Monarch Guide and is written by Dena Haines. If you see a squished bud, its insides won’t look red but green or yellowish. Do insects have blood? Instead of blood like humans, insects have a similar but distinctly different fluid. Learn about bug blood and about the insect circulatory system. Do Insects Have Blood? Bugs have a substance called hemolymph, which serves similar … The post Do ...