There are a few other Beatles tunes where Lennon's choice of harmonica might not be obvious. The signature riff of Please Please Me is almost as distinctive as the intro to Love Me Do.
The bile that is secreted by the liver and stored in the gallbladder is not the same as the bile that is secreted by the gallbladder. During gallbladder storage of bile, it is concentrated by removal of some water and electrolytes.
Your liver makes a substance called bile that helps with digestion. Your gallbladder stores it until you need it to digest fat. Then your gallbladder pushes the bile into tubes called bile ducts. They carry the bile to your small intestine.