Question

A substance X flows from heart into arteries and then into capillaries it is brought back to the heart by veins name the substance X

Answer 1

Answer:

it is obviously blood.

Explanation:

Answer 2

Explanation:

A line segment AP stands at the point P of a straight line BC such that angle APB =5x - 40° and angle APC = x + 10°;find the value of x and angle APB