Lymphatics and Immune System Review

A series of vocabulary flashcards related to the lymphatics and immune system, summarizing key terms and definitions for exam preparation.

Immune System

The complex collection of cells and organs that destroys or neutralizes pathogens that would cause disease or death.

Lymphatic System

The system associated with the immune system, comprising lymph vessels, lymphatic tissues, and organs, and responsible for transporting lymph.

Lymph

The clear fluid transported within lymph vessels, containing lymphocytes and other immune cells.

Innate Immunity

The body's immediate defense against pathogens, including physical barriers and immune responses that do not require prior exposure to a pathogen.

Phagocytosis

The process by which certain immune cells, like macrophages and neutrophils, engulf and digest pathogens.

Antigen Presentation

The process by which antigen-presenting cells (APCs) display antigens on their surface to T cells to stimulate an immune response.

B lymphocytes

A type of lymphocyte that differentiates into plasma cells, which produce antibodies.

T lymphocytes

A type of lymphocyte involved in cell-mediated immunity, which includes helper T cells and cytotoxic T cells.

Lymphedema

A condition characterized by the accumulation of interstitial fluid due to interference with lymphatic drainage.

Interferon

Hormone-like peptides produced by cells in response to viral infections, which help to protect other cells from infection.

Cytokines

Signals that allow immune cells to communicate over short distances.

MHC (Major Histocompatibility Complex)

A set of proteins displayed on cell surfaces that are important for immune system recognition of self and non-self.

Helper T Cells (Th cells)

CD4+ T cells that coordinate the immune response by signaling other cells to activate.

Cytotoxic T Cells (Tc cells)

CD8+ T cells that directly kill infected cells.

Antibodies

Proteins produced by B cells that specifically bind to antigens to neutralize or mark them for destruction.

Inflammation

A physiological response characterized by redness, heat, swelling, and pain, aimed at protecting the body from infection or injury.

Pathogen

Any organism or substance that causes disease.

Tonsils

Secondary lymphatic structures located at the entrance to the pharynx that guard against ingested or inhaled pathogens.