The chambers of the vertebrate heart are called atria. lower upper middle none of the above

i'm sorry, but can you list the answers? i cannot with something i don't know the answers to

,

chris

i don't know, but does anyone wanna be friends? i'm doing my homework at 1: 49 in the morning : /

imagine a line passing through the center of earth that goes through both the north pole and the south pole. this imaginary line is called an axis. earth spins around its axis, just as a top spins around its spindle. this spinning movement is called earth's rotation. at the same time that the earth spins on its axis, it also orbits, or revolves around the sun. this movement is called revolution.

it depends on how much it could carry.