Thyroid function tests are a series of blood tests used to measure how well your thyroid gland is working. Available tests include the T3, T3RU, T4, and TSH. The thyroid is a small gland located in the lower-front part of your neck.
Clipping path is a path or shape drawn from the shape tool as a rectangle or circle or any shape using pen tool. It is mainly used for clipping other layer over it. Means when you are having a image of a person standing and you made a shape of it and clipped it and see that the head shape is not proper, you can edit the shape afterwards.
In Photoshop you can create a vector shape using paths, tracing over the top of a photograph. You can then tell Photoshop to save the file so that only the part of the image contained within the path will appear in your layout program (InDesign or Quark). These vector paths are called clipping paths.