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.
These are flat polygonal bones that develop independently of the ribs and are first apparent at about 35 days gestation as a pair of mesenchymal bars lateral to the ventral midline in the thoracic region. Chest wall anatomy-rib cage. The manubrium forms first, followed by the sternal body and then the xiphoid process. The manubrium is located at the level of the T3 and T4 vertebral bodies and is the widest and thickest of the 3 sternal bones.