Later some non-science person thought that the gas floated to the top of the atmosphere to form a layer like the glass in a greenhouse. The popular view is that the atmosphere has some sort of layer of carbon dioxide up there that reflects heat back down to Earth rather than letting it escape to space.
The function of the human arm is to be able to reach objects with your hands.he function of the arm in the microscope is to support the tube  and connects it to the base. It is also use to transport the  microscope from place to place. 2 people found this useful. Edit.
Human Circulatory System. The human circulatory system functions to transport blood and oxygen from the lungs to the various tissues of the body. The heart pumps the blood throughout the body. The lymphatic system is an extension of the human circulatory system that includes cell-mediated and antibody-mediated immune systems. The components of the human circulatory system include the heart, blood, red and white blood cells, platelets, and the lymphatic system.