Lymphatic System Test Flashcards
what does the lymphatic system do?
transports excess fluid from internal spaces in tissues and returns it to the bloodstream
the order of the lymph flow through the lymphatic system from tissues to veins
Tissue → Lymphatic Capillaries → Lymphatic Vessels → Lymph Nodes → Lymphatic Trunks → Veins
what are the 2 major functions of the lymph nodes
- filtering harmful particles from the lymph before returning it to the blood
- having immune surveillance provided by lymphocytes and macrophages
what are the 2 lymphatic organs
thymus and spleen
what are the 2 types of cells that B lymphocytes create?
memory cells and plasma cells
memory cells
react quickly to future exposures of the pathogen antigens
plasma cells
secrete antibodies
why do B lymphocytes clone themselves?
to increase the number of cells that will later release the antibodies to fight off the disease
between primary and secondary immune responses, which one responds more quickly?
secondary immune response
primary immune response
activates B and T lymphocytes so the plasma cells can release antibodies and destroy the pathogens for several weeks
secondary immune response
B lymphocytes create memory cells to act on the antigens on the pathogens by releasing antibodies and enlarging quickly
what nonspecific response is described in the secondary immune response?
phagocytosis
cells engulf and digest other harmful cells
phagocytosis
antigens that trigger allergic reactions
allergen
proteins on the surface of cells that act like “name tags”
antigens