Why are muscles an essential part of the circulatory system?

The circulatory system carries oxygen, nutrients, and hormones to cells they remove waste products, like carbon dioxide. These roadways travel in one direction only, to keep things going where they should. :)

answer and explanation;

  distance on the y-axis and time on the x-axis.

explanation:

the instantaneous velocity = change in position/time taken

the slope of the graph should give instantaneous velocity.

  slope of a graph = change in value of y -axis / change in values of x -axis

  comparing both the equations

    change in value of y -axis = change in position

  change in values of x -axis = time taken

so position values should be on the y axis and time values should be on the x axis.

distance on the y-axis and time on the x-axis.