Lymphocyes are an important kind of white blood cell. They play a key role in the defense against pathogens and infections. They move in and out of organs through the endothelial lining of blood vessels as well as moving through the bloodstream. The lymphatic system also produces lymph, a fluid similar to blood plasma that travels through the body in its own set of vessels. Major lymphatic vessels branch off into small lymphatic vessels and then into lymphatic capillaries. The lymph nodes collect lymph fluid and white blood cells and filter out pathogens before they can reenter the bloodstream. Other important lymph organs include the thymus, adenoids, and spleen. This lecture also covers the basics of the immune system, including specific and non-specific defenses, T-cells, antigens, antibodies, and immune conditions.
Specific defenses (immunity) is innate or acquired and involves particular strategies pointed at certain species of bacteria or virus
T cells (cytotoxic, helper, or suppressor) are involved in cell-mediated immunity through antigen presentation
B cells work through antibody-mediated immunity and they include memory B cells
Antibodies are proteins secreted by B cells for attachment to foreign antigens
Immune conditions/disorders include allergies, anaphylactic shock, HIV/AIDS, and cancer
Did you know…
Q: Is there a difference between the lymphatic system and the immune system?
A: No, they are the same thing. Another variation on the name is “lymphoid”
Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.
This book is the ninth edition of the top-selling Human Anatomy & Physiology text and the authors have produced the most accessible, comprehensive, up-to-date and visually stunning anatomy & physiology textbook on the market.. It presents information in smaller and more digestible bites, making it easier to read and navigate.
This book has a superb balance between structure and function and continue to emphasize the correlations between normal physiology and pathophysiology, normal anatomy and pathology, and homeostasis and homeostatic imbalances. The acclaimed illustration program continues to be refined and is unsurpassed in the market. The thirteenth edition is fully integrated with a host of innovative electronic media, including WileyPlus 5.0 (access purchased separately.) No other text and package offers a teaching and learning environment as rich and complete.
This book includes updated examples, references, and dozens of illustrations. Readers of the new edition will come to understand the meanings of terms in anatomy and physiology, get to know the body's anatomical structures, and gain insight into how the structures and systems function in sickness and health. It also features updated information on how systems function in illness and in health.