Lymphatic System Flashcards
How are lymph vessels similar to veins?
They have the same 3 layers
What are the function and location of lymph nodes?
Filter and clean lymph, produce lymphocytes, contains macrophages
-located in armpit, neck, head and groin area
What are the function and location of the spleen?
Filters blood
-located in upper left part of abdomen under rib cage
What are the function and location of the thymus?
Development of T cells
-located in chest above heart
Describe the flow of lymph
Tissue Capillary Vessels Mode Vessel Trunk Duct Subclavian vein
What are the body’s non specific defenses?
Species resistance, mechanical barriers, killer cells, inflammation, phagocytosis and fever
What are innate defenses?
Non specific and provide general defense against disease by creating barriers or making the environment unfriendly to pathogens
What do Interferons do?
Respond to viruses or tumor cells
What are the functions of neutrophils?
White blood cells that are the first cells to migrate to a site of infection
What are the functions of macrophages?
A type of phagocyte,
Engulfs particles
What are antigens?
a toxin or other foreign substance that induces an immune response in the body, especially the production of antibodies.
What do B cells do?
Secrete antibodies
What are the functions of helper T cells?
Release T cytokines
What are the functions of Cytotoxic cells?
Kill damaged cells
What are the functions of memory T cells?
Divide to yield more cytotoxic T cells and helper T cells upon exposure to the same antigen
What are antibodies?
Identify and help remove foreign particles
What are the four types of immunity?
Naturally active immunity, artificially active immunity, artificially passive immunity and naturally passive immunity
What are the functions of the lymphatic system?
Protects the body from invaders/pathogens through general and specific immunity, transports and recollects fluid,
Filters fluid for harmful particles
What is natural immunity?
Lymphocytes are activated by foreign antigens on the surface of pathogens
What is artificial active immunity?
Immunity develops after an individual is given a vaccination
What is passive immunity?
A mothers antibodies cross the placenta to to the fetus and remain for several Months
What is artificially passive immunity?
Short term immunization achieved by the transfer of antibodies
How do vaccines work?
They can’t cause an infection, but the immune system still sees them as an enemy and produces antibodies in response. After the threat has passed, many of the antibodies will break down, but immune cells called memory cells remain in the body.
What is an autoimmune disease?
Immune system manufactures antibodies against its own antigens
