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Respiratory System

The body's survival depends entirely on eleven systems. Right now let's discuss the respiratory system. This system is entirely important for survival of all tissues because without the respiratory system tissues will die and we all would be dead. Our body depends on the external environment, it is both as a source for survival and as a basin for its wastes. Our cells depend on oxygen to carry out its functions and the cells give off carbon dioxide, a waste product. Respiration involves four processes: pulmonary ventilation, external respiration, transport of respiratory gases, and internal respiration. The pathway is entirely complex but I won't be going into depth. The pathway starts from the nose and ends at the alveolus. The respiratory is also coupled with the circulatory system because without it oxygen and carbon dioxide, the body's cells will begin to die from oxygen starvation.
Starting from the nose the air will run till it ends at the alveolus, a small sac where oxygen and carbon dioxide is exchanged. The functions of the respiratory system are: pulmonary ventilation, external respiration, transport of respiratory gases, and internal respiration. The pulmonary system is the movement of air into and out of the lungs so that the gases are continuously exchanged commonly called breathing. Second, the external respiration is the movement of oxygen from the lungs to the blood and of carbon dioxide from the blood to the lungs. Third, transport of respiratory gases is the transport of oxygen from the lungs to the tissue cells of the body, and carbon dioxide from the tissue cells to the lungs. This uses the cardiovascular. Last, the internal respiration is the movement of oxygen from blood to the tissue cells and of carbon dioxide from tissue cells to blood.
Breathing provides our head to be lightweight not heavy. The air enters hitting the nose and nasal cavity, pharynx, larynx, trachea,

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