Butterfly proboscis and galeal sliding

The video explains the structure and functionality of a butterfly's proboscis, which consists of two halves called Galia. When joined, they form a food canal. The proboscis is more complex than a simple straw, allowing butterflies to control liquid flow by sliding the Galia. This sliding can adjust the canal's diameter, reduce friction, and help remove blockages, enhancing liquid transport even with small amounts.

Describe the complexity of the butterfly's food canal compared to a simple drinking straw.

In what way can sliding help with small blockages in the food canal?