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 the second layer of the three major layers of layers of skin, located between the epidermis and subcutaneous tissues, also known as the subcutis and the hypodermis. The dermis has connective tissue, blood capillaries, oil and sweat glands, nerve endings and hair follicles. There are two part of the dermis: a thin, upper layer known as the papillary dermis, and a thick, lower layer known as the reticular dermis. Its thickness varies depending on the location of the skin.