Lymphatic System and Immunology Comprehensive Review

Vocabulary-style flashcards covering the components and functions of the lymphatic and immune systems based on the lecture transcript.

Nonspecific immune system

The system you are born with, including components like stomach acid and white blood cells.

Inflammation

A response to invaders that promotes healing.

Humoral immunity

Immunity mediated by antibodies that are secreted by plasma.

Cell mediated immunity

Immunity mediated by the destruction of infected cells by cytotoxic T-cells.

Adaptive immunity responses

The category that Includes both humoral and cell mediated immunity, allowing the body to defend itself.

Skin (First line of defense)

Acts as a physical barrier against Bacteria, UV rays, and temperature.

Cytotoxic T-cells

Cells that kill infected virus cells and tumors.

Helper T-cells

Cells that send signals to other cells to trigger an attack and act as primary managers of the adaptive immune system.

Memory T-cells

Cells formed after an infection that remember the pathogen to build immunity and fight faster.

Suppressor T-cells

Cells that keep the immune system from being overactive.

Nonspecific defenses

Pre-existing barriers like the skin and stomach acid.

Specific defenses

Defenses learned by the body from previous infection, such as B-cell antibodies.

Pus

A protein-rich fluid full of dead leukocytes.

Antigen

Found on the surface of a pathogen that the body recognizes as foreign; a substance that causes the body to make an autoimmune response.

Apoptosis

A programmed form of cell death used by killer T cells to kill pathogens.

Interferons

Substances that serve as an early warning system and boost the defense system.

Passive Immunity

Involves ready-made antibodies for temporary protection.

Active Immunity

Protection that reacts from the body's own antibodies and memory cells after infection to provide long-term protection.

Lymph node locations

Head, neck, armpits, chest, abdomen, pelvis, groin, and limbs (none in the CNS).

Types of pathogens

Bacteria, fungus, virus, parasites, and prions.

Perforin

A chemical released by cytotoxic T cells and killer cells that forms channels in the membrane of target cells to eliminate them.

Autoimmune

A process in which the immune system attacks the body.

Lymph nodes

Command centers that filter pathogens and abnormal cells and balance interstitial fluids.

Vessels of the lymphatic system

A one-way low-pressure drainage system.

Phagocytosis

A term associated with 'cell eating' by specialized white blood cells like macrophages and neutrophils.

B-cells

The type of cells that make antibodies of the adaptive immune system.

Innate immune responses

The non-specific and rapid first line of defense that occurs within hours to minutes.

Neutrophils

The most abundant white blood cell in the human body, making up $50-70\%$ of the body.

Natural active immunity

Immunity that comes from natural exposure, requiring one to get sick before the body makes memory cells.