Which blood vessel returns blood to the left atrium?
a. aorta
b. left and right pulmonary arteries
c. superior and inferior vena cava
d. left and right pulmonary veins

What the theory that the sun goes around earth was replaced with the theory that earth goes around the sun this was an exaple of a

Hairs that clean dirt out of the air in your nasal passages are called: a. sinus b. trachea c. cilia d. mucus

The starting materials in a nuclear change have a total mass of 2.3465 x 10-27 kg. after the change, the resulting materials have a mass of 2.3148 x 10-27 kg. how much energy was released during the change? 2.85 x 10-12 2.08 * 10-10 j 0 211 * 10-10 j 8.56 * 10-43