Antigen-presenting cells (APCs)

Antigen-presenting cells (APCs) are a type of immune cell that play a crucial role in the body's defense against infections. They capture pieces of harmful substances, like viruses or bacteria (known as antigens), and display them on their surface. This helps other immune cells, like T cells, recognize and respond to the threat effectively. In essence, APCs serve as important messengers in the immune system, informing it about what to look out for and ensuring a coordinated response to protect the body from disease.