How Does Your Immune System Work

The body's first line of defense, providing immediate, non-specific protection against pathogens through physical barriers and immune cells.

White blood cells are the frontline defenders of the immune system, identifying and attacking harmful pathogens like bacteria, viruses, and parasites.

A specialized defense system that targets specific pathogens and creates immunological memory for faster responses in the future.

Bone marrow produces white blood cells, including key immune fighters such as B cells and T cells, making it essential to immune function.

The lymphatic system transports immune cells throughout the body and filters out harmful substances via lymph nodes.

Antibodies are specialized proteins that recognize and bind to specific antigens, marking pathogens for destruction.

T cells coordinate immune responses and directly kill infected cells, playing a central role in adaptive immunity.

B cells produce antibodies and form memory cells, enabling the body to respond faster to previously encountered pathogens.

Antigens are foreign molecules that trigger immune responses, helping the body distinguish between self and non-self.

Inflammation is the body's immediate reaction to injury or infection, increasing blood flow and recruiting immune cells to the affected area.

Innate immunity provides rapid, non-specific defense through physical barriers like skin and immune cells such as macrophages.

The immune system’s ability to remember past infections, enabling faster and stronger responses upon re-exposure.

Adaptive immunity develops targeted responses and immunological memory, allowing for stronger protection upon repeated exposure.