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 dermis is an inner layer of the scalp that is thick and complex as regards its structure and constituents. In reality this is the place where all hair follicles, nerve endings, sebaceous and sweat glands, and blood capillaries and vessels are found.he dermis is an inner layer of the scalp that is thick and complex as regards its structure and constituents. In reality this is the place where all hair follicles, nerve endings, sebaceous and sweat glands, and blood capillaries and vessels are found.