biological defense

Biological defense refers to the body's natural system for protecting itself against harmful microorganisms like bacteria, viruses, and fungi. It involves a range of responses, such as skin acting as a barrier, immune cells recognizing and attacking invaders, and chemicals like antibodies neutralizing threats. These defenses work together to detect, respond to, and eliminate pathogens, preventing illness. The immune system also has memory, enabling quicker responses to familiar threats in future encounters. Overall, biological defenses are essential for maintaining health and preventing infections naturally.