There is a big difference between external and internal respiration. External respiration is basically the transfer of gas between respiratory organs such as lungs and the outer environment. It takes place prior to internal respiration. Internal respiration is the transfer of gas between the blood and cells.
Whatever happened to Julian Lennon? After seven years away from the limelight - a time spent getting his life back together after a disillusioning experience with pop stardom' - the son of a beloved rock icon returns to the public eye and ear with his own record label and a new album, Photograph Smile.
When The Beatles broke up in 1970, John Lennon focused on humanitarian and social activism. After the 1975 birth of his son Sean, John Lennon retreated from public eye to concentrate on his family. John Lennon and Yoko Ono's 1980  Double-Fantasy  album was planned to be his comeback in the music scene. Lennon was murdered just weeks after Double-Fantasy was released. The Imagine mosaic is shown, in this Dec. 7, 2000 file photo in the area known as Strawberry Fields in New York's Central Park.