Chapter 14: Need to Know Flashcards
antibody
protein produced by B cells to destroy antigens
antigen
substance that the body recognizes as foreign
axillary nodes
lymph nodes in the armpit
B cell (B lymphocyte)
lymphocyte that matures into a plasma cell to secrete antibodies
cervical nodes
lymph nodes in the neck region
cytotoxic T cell
lymphocyte that directly kills antigens; called CD8-positive T cell
helper T cell
lymphocyte that aids B cells and stimulates T cells. also called CD4-positive T cell
immunity
body’s ability to resist foreign organisms and toxins that damage tissues and organs
immunoglobulins
antibodies such as IgA, IgE, IgG, IgM, and IgD; secreted by plasma cells in response to the presence of an antigen
inguinal nodes
lymph nodes in the groin region
interstitial fluid
fluid in the spaces between cells. this fluid becomes lymph when it enters lymph capillaries
lymph
thin, watery fluid found within lymphatic vessels and collected from tissues throughout the body
lymph capillaries
tiniest lymphatic vessels
lymphoid organs
lymph nodes, spleen, and thymus gland
lymph node
collection of stationary solid lymphatic tissue along lymph vessels; contains cells (lymphocytes and macrophages) that fight infection
lymph vessel
carrier of lymph throughout the body; lymphatic vessels empty lymph into veins in the upper part of the chest
mediastinal nodes
lymph nodes in the area between the lungs in the thoracic cavity
natural immunity
protection that an individual is born with to find infection such as neutrophils, monocytes, macrophages, and NK cells. (natural killer cells) Is not antigen specific and does not elicit memory
plasma cell
lymphocyte that secretes antibodies. matures from B cells
right lymphatic duct
lymphatic vessel in the chest that drains lymph from the upper right part of the body
T cell (T lymphocyte)
lymphocyte that acts directly on antigens to destroy them or produce chemicals such as interferons and interleukins that are toxic to antigens
