How respiratory and Circulatory systems WorksRespiratory and circulation systems are very significant tour daily survival because the two systems play the role of body regulation. They two systems ensures that our body continues function through supply of oxygen to the heart, which then transports it to the brain to keep our nerves and all major parts of the body running. Respiratory systems help in exchange of both oxygen and carbon dioxide in the body (Maton & Jean et al. 2010).The circulatory system plays a significant role in the body in terms of helping in respiration, waste management, and nutrients supply in the body. The circulatory system contains vessels that help in the control of the flow of blood in the body. When blood begins to circulate in the body, the blood, for example, leaves the heart from the left ventricle and goes to the aorta. Aorta as the largest artery of the body ensures that the blood leaves it has enough oxygen. The blood from the aorta is, supplied to the brain, feet, heart, and even the lungs, thereby, enabling major functions of the body to take place, such as human beings remaining alive (Guyton & Hall 2000).Respiratory system