T cells are a type of lymphocyte that play a central role in cell-mediated immunity, recognizing and responding to antigens presented by other cells. They are crucial in the immune system's ability to target and eliminate infected or cancerous cells, as well as in orchestrating the overall immune response.

T Cells

T cells

Lymphocytes are a type of white blood cell crucial to the immune system, responsible for identifying and neutralizing pathogens like viruses and bacteria. They are primarily divided into B cells, T cells, and natural killer cells, each playing a unique role in immune response and memory formation.

lymphocyte

Cell-mediated immunity is an essential arm of the adaptive immune system where T cells, rather than antibodies, play the central role in defending against intracellular pathogens, such as viruses and some bacteria. It involves the activation of various T cell subsets that recognize and destroy infected or altered cells through direct contact or by releasing cytokines to modulate the immune response.

cell-mediated immunity

Antigens are molecules capable of stimulating an immune response, often by being recognized as foreign by the immune system. They are typically proteins or polysaccharides on the surface of pathogens, but can also include other substances like toxins or allergens.

antigens

The immune system is a complex network of cells, tissues, and organs that work together to defend the body against harmful pathogens and maintain overall health. It involves both innate and adaptive responses, which recognize and neutralize foreign invaders while also retaining memory for faster future responses.

immune system

When a cell in your body gets infected, it means a tiny germ, like a virus or bacteria, has gotten inside and is using the cell to make more germs. Your body has special helpers, like white blood cells, that try to find and stop these germs to keep you healthy.

Infected Cells

cancerous cells

The immune response is the body's defense mechanism against pathogens, involving a complex interplay between innate and adaptive immunity. It includes the recognition of foreign antigens, activation of immune cells, and the elimination of pathogens, while also maintaining tolerance to self-antigens to prevent autoimmunity.

Your Lessons