[dropdown 1] rami communicantes contain [dropdown 2] axons and only are present in the thoracic and L1-3 region.The rami are formed from [dropdown 3] neurons.
Dropdown 1 choices:
White
Gray
Dropdown 2 choices:
Myelinated
Unmyelinated
Dropdown 3 choices: Preganglionic sympathetic
Preganglionic parasympathetic
Postganglionic sympathetic
Postganglionic parasympathetic