If I had 100 hemoglobin molecules (again realize that we have hundreds of trillions of these) and I looked at each one and analyzed the amount of oxygen molecules bound to each I got these results:.How many oxygen molecules can each individual hemoglobin molecule bind to and carry? If we look at an individual hemoglobin molecule and it is bound to 4 individual oxygen molecules how saturated is it considered? How about an individual hemoglobin bound to 3 oxygen molecules, or 2 or 1 or 0?.You better know these dynamics!!! You will notice as I'm going over these slides I am giving you example questions. I've spent a lot of time describing the actions with slide 111 and 112.What is internal respiration vs external respiration? What happens to oxygen and carbon dioxide in each circumstance?.Based on slide 104 calculate the partial pressure of both oxygen and carbon dioxide if the atmospheric pressure dropped to 540mmHg.ON slide 101 there is a graphic of pulmonary volumes, either draw it and label it or simply define each of the categories of pulmonary volumes.What is the average interpleural pressure relative to the pressure in the lungs? Why is this important?.What is the difference between quiet and "forced" breathing?.For additional information visit Linking to and Using Content from MedlinePlus. Any duplication or distribution of the information contained herein is strictly prohibited without authorization. Links to other sites are provided for information only - they do not constitute endorsements of those other sites. A licensed physician should be consulted for diagnosis and treatment of any and all medical conditions.
The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. This site complies with the HONcode standard for trustworthy health information: verify here. Learn more about A.D.A.M.'s editorial policy editorial process and privacy policy. is among the first to achieve this important distinction for online health information and services. follows rigorous standards of quality and accountability. is accredited by URAC, for Health Content Provider (URAC's accreditation program is an independent audit to verify that A.D.A.M. As a result, the lungs contract and air is forced out.Ī.D.A.M., Inc. When the lungs exhale, the diaphragm relaxes, and the volume of the thoracic cavity decreases, while the pressure within it increases. The second phase is called expiration, or exhaling. As a result, air rushes in and fills the lungs. This increases the size of the thoracic cavity and decreases the pressure inside. At the same time, the muscles between the ribs contract and pull upward. When the lungs inhale, the diaphragm contracts and pulls downward. The first phase is called inspiration, or inhaling. The process of breathing, or respiration, is divided into two distinct phases. While the pleural membranes, and the pleural fluid, allow the lungs to move smoothly within the cavity. A sheet of muscle called the diaphragm serves other parts of the respiratory system, such as the trachea, or windpipe, and bronchi, conduct air to the lungs. They sit to the left and right of the heart, within a space called the thoracic cavity. The two lungs are the primary organs of the respiratory system.
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