According to the Bohr model, the wavelength of the light emitted by a hydrogen atom when the electron falls from a high energy (n = 4) orbit into a lower energy (n = 2) orbit.
A network of arteries and veins also carry blood throughout the body: Arteries transport blood from the heart to the body tissues. Veins carry blood back to the heart.ow the heart works. The heart is a large, muscular organ that pumps blood filled with oxygen and nutrients through the blood vessels to the body tissues. It's made up of: Four chambers. The two upper chambers, the atria, receive and collect blood.
That means that when you add them up the body of an adult contains 100,000 miles of arteries, veins and capillaries. The blood vessels in a child's body would be more than 60,000 miles long.t takes the heart less than one minute to pump blood to every cell in the body. In fact, six quarts of blood can fully circulate throughout the body at least three times within that minute. That totals thousands of round trips each day.