Human Biology

Moles — medically known as melanocytic nevi — are common skin growths composed of pigment-producing cells called melanocytes. These small, usually brown or black spots can appear anywhere on the…

Hormones are powerful chemical substances that play a vital role in maintaining balance and coordination across all body systems. Produced by various endocrine glands, hormones regulate everything from metabolism and…

The human immune system is one of the most complex and vital defense systems in the body. It works silently and constantly to protect us from bacteria, viruses, fungi, parasites,…