What might be mistaken for a waterslide in this image is actually the breathing tube, or trachea, of a dragonfly. This tube connects to openings in the insect's exoskeleton (outer “shell”) called ...

You probably don’t look like an insect. You don’t have feelers or wings. You keep your skeleton inside your body instead of on the outside. But what about blood? Do insects have blood like yours? I ...