Chapter 21 (Lymphatic System) Flashcards
fluid contained within the lymphatic system
Lymph fluid
one of the bean-shaped organs found associated with the lymphatic vessels; removes debris and pathogens from lymph
Lymph node
smallest of the lymphatic vessels and the origin of lymph flow
Lymphatic capillaries
large lymphatics that collect lymph from smaller lymphatic vessels and empties into the blood via lymphatic ducts
Lymphatic trunk
What is the flow of lymph throughout the body?
Lymph capillaries, lymphatic vessels, lymphatic ducts, circulatory system
network of lymphatic vessels, lymph nodes, and ducts that carries lymph from the tissues and back to the bloodstream.
Lymphatic system
any of the group of proteins that binds specifically to pathogen-associated molecules
Antibody
molecule recognized by the receptors of B and T lymphocytes
Antigen
lymphocytes that act by differentiating into an antibody-secreting plasma cell
B-cells
cytotoxic lymphocyte of innate immune response
Natural killer cells
differentiated B cell that is actively secreting antibody
Plasma cell
lymphocyte that acts by secreting molecules that regulate the immune system or by causing the destruction of foreign cells, viruses, and cancer cells
T-cell
the site of all blood cell differentiation and maturation of B lymphocytes
Bone marrow
primary lymphoid organ; where T lymphocytes proliferate and mature
Thymus gland
What are the 2 primary lymphoid organs?
Thymus gland and bone marrow
Site where lymphocytes mount adaptive immune responses
Secondary lymphoid organs
What are 2 examples of secondary lymphoid organs?
Spleen, lymph nodules
secondary lymphoid organ that filters pathogens from the blood (white pulp) and removes degenerating or damaged blood cells (red pulp)
Spleen
aggregate of lymphoid follicles directly associated with the mucous membrane epithelia; found in gastrointestinal tract, breast tissue, lungs, and eyes
MALT
unencapsulated patches of lymphoid tissue found throughout the body
Lymphoid nodules
Lymphoid nodules important in developing immunity to oral pathogens
Tonsils
What is significant about lymph capillaries?
Contain endothelial flaps that prevent the back flow of lymph
ingest pathogens to destroy them
Phagocytic cells
specifically coordinate the activities of adaptive immunity
Lymphocytes
help mediate immune responses against parasites and intracellular pathogens such as viruses
Cells containing cytoplasmic granules
antipathogen defenses deriving from a barrier that physically prevents pathogens from entering the body to establish an infection
Barrier defenses
relatively slow but very specific and effective immune response controlled by lymphocytes
Adaptive
Immunity you’re born with
Innate
Loss of immunity with aging
immunosenescence
Has physical barrier that prevents pathogens from entering, also has secretions (sweat and sebaceous glands) that make the environment have a low pH
Skin
Lysozymes in mouth
Salivary glands
low pH in stomach
GI tract
Prevent pathogens from growing on mucosal surfaces
Normal flora
