How mosquitoes transfer viruses and diseases to humans

The video explains how mosquitoes use their anatomy to extract blood from hosts. Their saw-like teeth cut through skin, while mandibles hold tissue apart. The labrum digs under the skin to find blood, and the hypopharynx injects saliva to keep blood flowing. Mosquito saliva dilates blood vessels, blocks immune responses, and lubricates the proboscis, causing itchy welts and potentially transmitting viruses like Zika and West Nile.

Describe the process by which a mosquito extracts blood from its host.

Name two dangerous viruses that can be transferred by mosquitoes.