The video shows how our lymphatic system works undercover to protect our immune system. The network transports about two liters of lymphatic fluid throughout the body, identifies pathogens, trains ...

Like a highway system, the vagus nerve branches profusely from your brain through your organs to marshal bodily functions, including aspects of mind such as mood, pleasure and fear. It is late at ...

The human body’s defensive lineup is impressive—from made-to-order antibodies to natural-born killers. Here’s how it wards off sickness in every season. When pathogens invade our bodies—in the form of ...