Unit 5: Hemoglobin Testing 6 Original: October 1999 Revision: September 2010 Before you learn about how to use the HemoCue machine and take blood from clients, you need to learn about anemia and the causes of anemia.
Skin has three layers: 1  The epidermis, the outermost layer of skin, provides a waterproof barrier and creates our skin tone. 2  The dermis, beneath the epidermis, contains tough connective tissue, hair follicles, and sweat glands. 3  The deeper subcutaneous tissue (hypodermis) is made of fat and connective tissue.
The skin consists of two quite different layers: (1) the epidermis, a superficiallayer of stratified epithelium that develops from ectoderm, and (2) the dermis, or corium, an underlying layer of connective tissue that is largely mesodermal in origin.The dermis makes up the bulk of the skin.he area of the body surface is about 2 sq m. The temperature of the skin in general is normally about 32 to 36 degrees C. (90 to 96 degrees F.). The skin (fig. 4-1) varies in thickness from about 0.5 to 3 mm. It is thicker on the dorsal and extensor than on the ventral and flexor aspects of the body.