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.
Human skin has three layers: the dermis, epidermis, and hypodermis. Each layer has different functions. The deepest layer, the hypodermis, is also known as subcutaneous tissue. This layer is responsible for regulating body temperature, and also protects the inner organs and bones. In addition to its other functions, this layer of skin plays a role in pigmentation.