Which term describes the long, tubular mouthpart used by adult mosquitoes for piercing and sucking?

• A. Proboscis
• B. Palps
• C. Siphon
• D. Bridge Vector

Answer: (A)

The term for the long tubular mouthpart that adult mosquitoes use to pierce skin and suck blood is the proboscis. This structure acts as a piercing-sucking tool, with slender needle-like components (the stylets) arranged to penetrate the host’s skin, while saliva containing anticoagulants is injected to prevent clotting and ease blood flow through the same channel. Palps are small sensory appendages near the mouth used to detect host cues rather than to pierce tissue. The siphon is a respiratory tube associated with how some mosquitoes breathe, not feeding, and a bridge vector is a disease-transmission term, not an anatomical part. So, the proboscis is the correct term for the feeding mouthpart.