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.
A lead is simply a wire used to connect two parts electrically. The method of clipping the lead to the component (part) determines its name. An alligator clip test lead uses a small metal clothespin for connecting, while a mini-hook clip lead is like a small, spring-loaded crochet hook.