source: [tag=□ | □] □ □
destination: [tag=NNS | □] □ □
spec: The typical textbook presents students with beautifully rendered , full-color diagrams of cells with every part carefully labeled -- centriole , endoplasmic reticulum , Gogli apparatus , and so on -- but rarely devotes as much care to explaining the central idea that these parts have specific functions that serve the cell and ultimately the organism . Think of the titles on Muldaur 's albums : " Password " and " Secret Handshake .