[Headcanon] A Gigalith's anatomy

Here is a little headcanon, I imagined how the interior of a Gigalith could look. As it's only a headcanon, it's nothing official.

An idea of the interior of a Gigalith. Blue lines represent empty spaces,

red lines represent muscles; 

-When a Gigalith eats, the food are stocked into some sort of pocket then converted into energy by special crystlas located inside the Gigalith's body. This energy is then distributed everywhere in the Gigalith's body, circulating in the empty spaces. All the rests are evacuated. 

The energy coming from the sun is absorbed by the red crystals and is also distributed to the core and the body. 

-Exposing a Gigalith's energy core would cause the energy to overflow very brutally and would kill the Gigalith. The way between the core and the mouth only opens when it attacks.

-The mouth is used both to eat and to fire off attacks with the energy. The food and energy don't take the same way as the food has to go into the stomach first.