You've probably heard someone use the phrase "blood red," but have you ever wondered if all blood really is red in humans?
Imagine that you're an insect, and that you've fallen ill because some bacteria or parasites have invaded your body. What do you do?
Do insects even have hearts? Sure they do, but their hearts are somewhat different from human hearts.
Here’s how innate immunity works. In your bug body there is a fluid called hemolymph, which is equivalent to human blood. If you’re injured, components in the hemolymph interact with specialized cells in your immune system to clot and form a scab that seals off your wound and prevents infection.