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.
Inside the capsule, the layers are as follows, from outside to inside: 1  Parietal layerâA single layer of simple squamous epithelium. 2  Bowman's space (or urinary space, or capsular space)âBetween the visceral and parietal layers, into which the filtrate enters after passing through the filtration slits.