LABORATORY 7: LYMPHATIC SYSTEM AND IMMUNITY
SECTION 4: CIRCULATION OF LYMPH AND LYMPHATIC VESSELS
Lymph is excess interstitial fluid from peripheral tissues that has entered a lymphatic vessel. Lymphatic vessels, or lymphatics, transport the lymph back to the bloodstream to help maintain normal blood volume and prevent edema in the peripheral tissues. Use the textbook to help you number the correct order of lymph flow back to the venous system.
1. Interstitial fluid
2. Superficial and deep lymphatic collecting vessels
3. Thoracic and right lymphatic ducts
4. Lymphatic trunks
5. Lymphatic capillaries
6. Small lymphatic vessels
7. Subclavian veins
8. Blood
SECTION 5: INNATE (NON-SPECIFIC) DEFENSES
Innate (non-specific) defenses are the body's first line of defense and protect against a wide range of pathogens without distinguishing between specific types. They include physical barriers, phagocytes, immune surveillance, interferons, the complement system, inflammation, and fever. Match each innate (non-specific) defense mechanism with its correct definition.
1. Skin and mucous membranes which prevent hazardous organisms from entering the body - A. Physical barriers
2. Neutrophils and monocytes that engulf pathogens and cellular debris - B. Phagocytes
3. An elevation in body temperature that speeds up reactions that aid in repair and defense of the body - G. Fever
4. Localized response at the tissue level to prevent the spread of an injury or infection - F. Inflammation
5. Natural Killer (NK) cells destroying abnormal cells in peripheral tissues - D. Immune surveillance
6. A system of circulating proteins that assist antibodies in the destruction of pathogens - E. Complement system
7. Chemical messengers released by cells to prevent further infection by viruses - C. Interferons
PRINCIPLES OF HUMAN ANATOMY AND PHYSIOLOGY II
