Which comparison is correct? The spinal cord is like a highway, and the nerves are like the roads that branch off the highway.
The spinal cord is like an information center, and the nerves are like the news broadcasts from it.
The spinal cord is like the insulation inside a wall, and the nerves are like the outer shell of the wall.
The spinal cord is like a power generator, and the nerves are like the power lines connected to it.

10/10 recommend bring pads/tampons with you no matter what. im 16 & i’ve had mine since i was 12 and they’re still it regular, but id suggest using the glow app, many women use it for fertility reasons but i use mine specifically for the period tracking portion and it guesses when your next period will most likely be for the next two months. i dont believe theres any way to delay your period, so id say hope for the best but make sure to bring all of your stuff just incase. have a good cruise!