Sweat gland

In humans, there are four kinds of sudoriferous or sweat glands which differ greatly in both the composition of the sweat and its purpose.
 * eccrine glands - sweat (normal sweat used in temperature control)
 * apocrine glands - sweat,fats,proteins (slightly more viscous sweat)
 * ceruminous glands - ear wax (modified sweat)
 * mammary glands - milk (modified sweat)