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.

What forms the food canal in a butterfly's proboscis?

• A spiral structure

• Multiple small tubes

• A single tube

• Two halves called Galia

How does a butterfly enhance the flow of liquid through its proboscis?

• By sliding the Galia along each other

• By changing the color of its wings

• By vibrating its wings

• By flapping its proboscis

What effect does Galeal sliding have on the food canal's diameter?

• It shortens the canal

• It makes the canal spiral

• It widens the diameter

• It narrows the diameter

In what situation does Galeal sliding improve liquid transport?

• When the amount of liquid is small

• When the canal is blocked

• When the liquid is hot

• When the liquid is cold

How does Galeal sliding help with blockages in the food canal?

• By creating a vacuum

• By removing small blockages

• By changing the liquid's temperature

• By increasing pressure