These are the basic terms used for all the different parts of a shirt. Men's clothing is a vast subject which takes time to learn, especially on a subjective level. These images evince just what is most important on a shirt and where it is located. I suppose, as much as you will learn from it, your tailor, shirt maker or salesman in the store should and must know what the anatomy of a shirt entails. There's so much to the subject of shirts, the collars, the sleeves, the buttoning, the cuffs, the fabrics, and the patterns. What is cannot be disputed is that it forms an integral part of an outfit and it definitely says a lot about attention to detail.
PG: Man to man, generation to generation.