The honey bee's stinger is a self-contained venom-delivery system that keeps working after the bee flies away. Researchers captured this action with high-speed video, revealing a double-piston mechanism with collapsible valves that inflate on the downstroke to push venom and deflate on the upstroke, according to a paper in PNAS reported by Ars Technica.
The study used micro-CT scans and a 3D-printed prototype to confirm the kinematics. Two pistons work in opposition, delivering continuous flow and minimizing backflow. The authors note that the valve geometry is the key, acting as collapsible pistons in a compact, autonomous unit.
For business and engineering, the mechanism offers a blueprint for compact autonomous pumps. The researchers point to applications in microneedles, tissue transport, drilling devices, and artificial pumps. Future work on material properties and capillary action could refine these designs. This analysis is based on a single source; no conflicting reports were included.