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.
After you've administered the child two breaths and he remains unresponsive (no breathing, coughing or moving), check his circulation CIRCULATION C is for CIRCULATION. Check the child's carotid artery for pulse by placing two fingertips and applying slight pressure on his carotid artery for 5 to 10 seconds.