Anatomy and Physiology Lab

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BIOS 255 WEEK 5 Lab 5 - Lymphatic System & Disease Resistance 1. Describe lymphatic system functions. The three major functions of the lymphatic system are: 1) It drains excess interstitial fluid from tissue spaces and return it to the blood. 2) It transports lipids and lipid-soluble vitamins absorbed by the gastrointestinal tract. 3) It carries out immune responses directed against particular microbes or abnormal cells. 2. Locate each of the following lymphatic vessels: right lymphatic duct, thoracic (left lymphatic) duct, right and left subclavian veins, and cisterna chyli. a. Right lymphatic duct b. Thoracic (left lymphatic) duct c. Right and left subclavian veins d. Cisterna chyli . e. Determine the direction of blood and lymph movement between arterioles, blood and lymph capillaries, and venules. Blood and lymph move between arterioles, blood and lymph capillaries, and venules through lymphatic capillaries. These capillaries are located in the spaces between cells and are closed at one end. Blood capillaries converge to form venules and then veins. Lymph flows through lymph nodes. f. Describe the lymphatic system role with regard to lipids and lipid-soluble vitamins. The lymphatic vessels transport lipids and lipid-soluble vitamins A, D, E, and K absorbed by the gastrointestinal tract. 2. What are the thymus gland functions? The thymus serves a vital role in the training and development of T-lymphocytes or T cells, an extremely important type of white blood cell. It is responsible for the inborn immunity. 4. Identify each of the following in a lymph node: afferent lymphatic vessels and efferent vessels. a. Afferent lymphatic vessels

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