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.
Are onions bad for your cat or dog? What foods should pets avoid?
Although the earth has been hit by asteroids in the past, and will surely be hit again someday, much of the gloom-and-doom you hear about in the media is based on very little data.