longitude and latitude
All lines of longitude meet at the poles; none pass through. No lines of latitude connect at or pass through either pole.
All lines of longitude pass through the Equator.
There can be infinitely many lines: think of the longitudes through he North and South poles. However, there can be only one straight line.
The equator and the tropic of Capricorn
Both poles are on both of those lines, but to be very technical about it,those lines don't "pass through" either pole.The poles are the end-points of both the Prime Meridian and the InternationalDate Line. So when either line reaches the pole, it stops there, and it doesn'tpass through.
Meridians are lines of longitude that pass from the North to the South poles.
All lines of longitude pass through the Equator.
An infinite number of lines can pass through a point.
The Prime Meridian touches both the north and south poles, but if you reallywant to be correct about it, it doesn't 'pass through' either of them.The poles are the ends of the Prime Meridian. So when it reaches each pole,it stops there, and doesn't 'pass through'.
Well, not exactly. Technically, all meridians of longitude run between the north andsouth poles, so their ends are at the poles, and they don't pass through. But you'recorrect in your description that if you follow any line of longitude south, eventuallyyou wind up at the south pole, because they all meet there.
An infinite number of lines can pass through any given point.
The Equator is a longitude line. Latitude lines pass through the equator.