T cells are a type of white blood cell that are a crucial part of the adaptive immune system, responsible for fighting infection, cancer, and autoimmune diseases. They originate in the bone marrow, mature in the thymus, and are trained to recognize foreign invaders while ignoring the body’s own cells. The two main types are cytotoxic T cells, which directly kill infected or cancerous cells, and helper T cells, which coordinate the immune response by signaling other immune cells. Functions of T c

BIOLOGY | MEDICAL | HEALTH on Instagram: "Cells are the fundamental building blocks of all living organisms, performing essential functions such as energy production, nutrient processing, and reproduction! Despite their complexity, most cells are incredibly small and can only be seen under a microscope. Animal cells typically range from 10 to 30 micrometers in size, while plant cells are generally larger, reaching up to 100 micrometers due to their rigid structures. Bacterial cells are much smal