External and Internal Respiration (Gas Exchange) SIMPLIFIED!!!

Get the NEW BLOOD FLOW app with several step-by-step videos several flash cards, quiz questions and notes to make sure you ace your exams!!! Apple Store: https://itunes.apple.com/us/app/blood... Google Play: https://play.google.com/store/apps/de... Get the ENDOCRINE app with videos on the go for Apple and Andoird devices!!! iTunes: https://itunes.apple.com/us/app/endoc... Google Play: https://play.google.com/store/apps/de... Preview Video (on YouTube):    • FREE Endocrine App for Google Play   Or search for "Endocrine" or "ProfRoofs" or "John Roufaiel" in the medical category. You can find this video and other helpful videos/materials on my website: www.profroofs.com This video introduces the details of external and internal respiration. It was produced in response to a viewer's request who had an upcoming exam. In the near future I hope to add more detail. Please feel free to add suggestions. Thank you.