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.

The largest muscle in the human body is the Gluteus Maximus. It is responsible for keeping your posture upright, and is the principal antigravity force working when you walk up stairs.

The human body is a wonderous thing, especially when you consider how intricate and efficient each bodily system is. For instance, an adult’s blood vessels could encircle the earth 2.5 times if ...

Present in all humans as well as animals, plants, and fungi (essentially anything that has a cellular structure with an envelope-enclosed nucleus), the endocannabinoid system is a full-body ...

The relationship between the human mind and body has been a subject that has challenged great thinkers for millennia, including the philosophers Aristotle and Descartes. The answer, however ...

Lungs are among the heaviest organs in the human body. The right lung typically weighs about 1.4 pounds (0.6 kg), while the left lung is slightly smaller and weighs approximately 1.25 pounds (0.56 ...

The thermoregulation system includes the hypothalamus, sweat glands, circulatory system, and skin. The human body maintains a temperature of about 98.6°F (37°C) using various physical processes.

The integumentary system is the physical system that forms the barrier between the external environment and the internal systems of the body. In humans, this system consists of skin, hair, nails ...