Answer:
but you have not shown us the pictures..
The system that prepares food for absorbtion into the bloodstream is the digestive food. It makes sure the food in the stomach is broken down.
The immune system is the body's first line of defense against pathogens.
I believe the answer is vitamin. I know glucose converts into vitamin C so I think that's it. I hope it helps :)
The meaning of life lies within the individual...... :)
