Compose 400 words or more discussion to respond the following: What are the overall functions of the respiratory system? Name the principal organs of the upper and lower respiratory system. What is meant by the term Bronchial Tree? How many lobes are in the right and left lung? What is the term of pulmonary ventilation? Mention types of breathing. What is Oxyhemoglobin? What is carbaminohemoglobin? How does carbon dioxide affect the PH of the blood?