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02 Transport and Gas Exchange - Medical Animation

 

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02 Transport and Gas Exchange - Medical Animation
MEDICAL ANIMATION TRANSCRIPT: The respiratory system regulates oxygen and carbon dioxide levels within the blood. Respiration includes ventilation, gas exchange between the air, blood, and tissues within the body, and the use of oxygen for metabolism. Inhalation allows oxygen to enter the body, pulling air into the nose and mouth, lungs, and into the air sacs called alveoli, where gas exchange takes place. Alveoli move freely when air is inhaled and exhaled. Capillaries are small blood vessels that line the walls of the alveoli. During gas exchange, oxygen enters and carbon dioxide exits the bloodstream via the alveolar-capillary membrane. Once oxygen molecules move from the alveoli into the capillaries, they dissolve into the plasma and enter the red blood cell or erythrocyte. Erythrocytes contain millions of soluble proteins called hemoglobin. Hemoglobin contains four subunits each capable of binding one molecule of oxygen. Once one molecule of oxygen binds to one of the subunits, the other sites bind oxygen more readily. Dissolved and bound oxygen flows through the arterial bloodstream to capillaries within tissues. Upon arrival, carbon dioxide loading of the erythrocyte promotes oxygen unloading. Oxygen metabolism within cells produces carbon dioxide gas as a metabolic waste. Carbon dioxide exits the cells and tissues and is converted into bicarbonate within the erythrocytes. Converting carbon dioxide to bicarbonate releases hydrogen ions that decrease oxygen affinity for hemoglobin, freeing the oxygen to be delivered to tissue cells. After delivering oxygen to the tissues, the carbon dioxide-rich blood returns to the lungs through the venous circulation and then to the pulmonary artery. Inside each erythrocyte, the bicarbonate conversion is reversed, recreating carbon dioxide, which diffuses across the erythrocyte into the alveoli and lungs and is excreted out of the body. ♪ [music] ♪

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What attorneys say about MLA and The Doe Report:
"I wanted to take some time out to let you know what a wonderful job you did with the 'collapsed lung/fractured rib' illustrations. They were both detailed and accurate. My medical expert was comfortable working with them and he spent at least an hour explaining to the jury the anatomy of the lungs, the ribs and the injuries depicted in the illustrations. Needless to say, the jury was riveted to the doctor during his testimony.

The jury returned a verdict for $800,000.00 and I'm sure we would not have done so well if not for the visualizations we were able to put forth with your assistance. Lastly, my special thanks to Alice [Senior Medical Illustrator] who stayed late on Friday night and patiently dealt with my last minute revisions."

Daniel J. Costello
Proner & Proner
New York, NY

"Thank you for the wonderful illustrations. The case resulted in a defense verdict last Friday. I know [our medical expert witness] presented some challenges for you and I appreciate how you were able to work with him."

Robert F. Donnelly
Goodman Allen & Filetti, PLLC
Richmond, VA

"I thought you might want to know that after we sent a copy of your illustration to the defendants, with a copy to the insurance company, they increased their offer by an additional million dollars and the case was settled for $1,900,000.00.

I appreciate your help!"

O. Fayrell Furr, Jr.
Furr, Henshaw & Ohanesian
Myrtle Beach, SC
www.scmedicalmalpractice.com

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Levy, Angstreich, Finney, Baldante & Coren
Philadelphia, PA













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