The lymphatic system drains into lymphatic trunks (right and left lymphatic duct) which drains into vessels of the neck (right subclavian vein)
Answer:
the brain stem
Explanation:
the structures of our brain stem, in conjunction with our spinal cord (not a part of our brain) is responsible for involuntary action. Not sure if it generate signals, but hey it's better than no answer.
the lithosphere is inbetween
