Lymphatic & Immune Systems

Flashcards about the Lymphatic and Immune Systems

Lymphatic System

A network of vessels and structures that acts as the drainage system of the body.

Lymph nodes

Small, glandular structures concentrated in the neck, axilla, and groin that produce and store lymphocytes; home to macrophages that filter lymph.

Lymph nodules

Masses of lymphoid tissue comprised of macrophages and lymphocytes; not encapsulated like lymph nodes.

Spleen

Largest lymphoid organ, located in the upper-left quadrant of the abdomen; filters the blood.

Tonsils/Adenoids

Protect the entrance to the digestive system.

Thymus

Posterior to the sternum; responsible for the production and maturation of T-cells.

Interstitial fluid

Tissue fluid found between cells; once collected and filtered, it is called lymph.

Immune System

A complex network of organs, cells, and proteins that defends the body against infection while protecting the body's own cells.

Antigen

Foreign substance within the body.

Antibody

Protein the body creates in response to specific antigens.

Immunoglobulins

Antibodies.

B-cells

Type of lymphocyte that can recognize antigens and responds by turning into plasma cells, which create antibodies against specific antigens.

T-cells

Type of lymphocyte that can recognize antigens and attaches to them to attack the invading cells directly.

Monocytes

Engulf and destroy pathogens that have been coagulated with antibodies.

Mononucleosis

Transmitted through saliva; complications can result in an enlarged spleen.

Inflammation

Body response to injury or infection involving white blood cells; can be triggered unnecessarily in autoimmune disorders.

Fever

An indication of an underlying condition and an increase in internal body temperature.

Autoimmune disorders

Overactive immune system; the body attacks its own healthy cells/tissues.

Immunodeficiency disorders

Underactive immune system; the body is not able to fight off infections.

Allergies

Body has an extreme/abnormal response to a foreign substance that doesn’t normally affect other people.

Anaphylaxis

Severe, potentially fatal allergic reaction.