That's a good start! It's true that cells are the building blocks of the skin, inner linings, and glands. But let's be a bit more specific:

* Skin: The skin is made up of multiple layers of different types of cells.

* The outer layer (epidermis) is primarily composed of keratinocytes, which produce keratin (a protein that makes the skin tough and waterproof).

* The inner layer (dermis) contains a variety of cells, including fibroblasts (which make collagen and elastin), blood vessels, nerve endings, and hair follicles.

* Inner Linings: These are also called mucous membranes, and they line the inside of organs like the mouth, stomach, and intestines. These linings are made up of epithelial cells that are specialized for different functions.

* Glands: Glands are made of cells that produce and secrete substances like hormones, sweat, saliva, and digestive enzymes. Different glands have different types of cells.

So, while it's accurate to say cells form these structures, it's important to understand that there are many different types of cells involved, each with its own specific function.