Protons electrons and newtrons
<span>The protons and neutrons are located in the nucleus of the atom</span>
Neurotransmitters is the word you're looking for.
The two differences you see when comparing the four chambers of the heart is that the arteries have a thicker wall and veins have thin walls and that the arteries carry oxygenated blood away from the heart which means they get more pressure than veins.
Hormones -- such as melatonin and cortisol; the former signals the body to go to bed, while the latter signals for the sleeping person to wake up -- are created by physiological changes.
Answer:
ther economic status influence how we perceive the place where we live and other parts of the world.
Explanation:
