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 VF are paired structures located in the larynx, just above the trachea, which vibrate and are brought in contact during phonation. The human VF are roughly 12 â 24 mm in length, and 3â5 mm thick. Histologically, the human VF are a laminated structure composed of five different layers.