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.
3. Melanocytes. These types of cells found in the skin are cells that produce melanin and they are found at the heart, the bones, the meninges, the inner ear, the unea, and the stratum basel (bottom layer) of the epidermis.Melanin is the substance that determines what color a skin will posses.angerhans cells are cells that present antigen and are located on the mucosa and skin. They are always found in all the epidermis layers but are very rampant in the stratum spinosum. Langerhans can also be found in the blood vessels and the mucosa of the foreskin, mouth, and vagina.