Choose all the answers that apply.

light
travels in longitudinal waves
does not require a medium to travel through
slows down when traveling through more dense substances
speeds up when traveling through less dense substances
can be absorbed and transformed into heat
is refracted when it changes direction and speed

the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.

this is a good question! i'll do some research and come back when i have the answer!

i thinking chemical change