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.
Confidence votes 514. Humans have 3 major skin layers: 1. The epidermis is the outermost covering of the skin and it provides a weatherproof barrier. 2. The dermis is below the epidermis and it cushions the body from stress and strain. 3. The Hypodermis is below the dermis and is responsible for connected muscle tissue, bone, and skin.