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.
Overview of Blood Vessel Disorders. The blood supply in the skin (cutaneous blood supply) is delivered by an interconnecting network of small arteries (arterioles), veins (venules), and tiny vessels called capillaries that connect the arterioles to the venules.Before birth, certain cells are responsible for stimulating blood vessel development.verview of Blood Vessel Disorders. The blood supply in the skin (cutaneous blood supply) is delivered by an interconnecting network of small arteries (arterioles), veins (venules), and tiny vessels called capillaries that connect the arterioles to the venules.