Question: Pixels and Texels

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Ok, so a picture is made up of pixels and a texture is made up of texels, but i'm a little confused about how a texture is not a picture. Does anyone know the difference between pixels and texels? Or the difference between a picture and a texture?

A texture is a picture of the surface/skin of an object. In computing, a model is made up of polygons. When you render the model, the texture is apply on the surface to give it more realistic feel. eg: you can apply a skin texture to the surface a hand or a wood texture to the surface of a table.

If I then saved that render would it become a picture? So texels are only used in the building process? And once it is finished into a picture it then uses pixels?

A picture is only constructed of pixels but in constructing it, textels may have been used.
A texture is a visual attribute applied to an object, as CloudWalker says. Think of plain concrete paving slabs, and concrete paving slabs with a realistic woodgrain pattern on them - they're all made of the same concrete (pixels) but some look more like wood because a texture (textels) was moulded into them during construction.

You see all those squares on the floors and walls that make them look like they got chickenpox? Those are texels.

I think I understand now. So when something is being built, such as in a 3D program, the texture being added to that object will be made up of texels and once that object has been rendered into a picture it will then be made up of pixels. Have I got that about right?

Thankyou everyone for answering I appreciate it.