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# Integumentary system

The integumentary system is everything covering the outside of our bodies. This means skin, hair, scales, nails, sweat glands and their products (sweat and mucus). The name comes from the Latin integumentum, which means 'a covering'.

## The integumentary system

Skin, hair, scales, feathers and nails make up the integumentary system.

### Skin

There are two layers of skin:

1. Epidermis - This is the top layer of the skin and is made of dead cells. The cells are shed all the time, but new ones are always being made, so people never lose any skin. It has sweat pores.
2. Dermis - This is the second layer of skin. It has touch receptors, and oil and sweat glands. It makes skin stretchy.
3. Subcutaneous tissue (The subcutaneous tissue is not part of the skin, but it is in the integumentary system)

### Glands

There are four types of glands:

## Functions

The integumentary system has lots of different functions, it:

## Problems

Here is a list of skin problems:

There are other skin problems that are less common.

## References

      . http://www.amazon.com/Vertebrates-Comparative-Anatomy-Function-Evolution/dp/0072909560.