The endocrine system is a network of glands that secrete hormones directly into the blood. These hormones regulate growth, metabolism, reproduction, and many vital body functions. Unlike exocrine glands, they do not have ducts → they are called ductless glands. 1. Pituitary Gland – Master Gland Hormones & Functions: 2. Thyroid Gland 3. Parathyroid Glands […]

A surprising new study reveals that Earth’s biodiversity may be influenced by a hidden cycle beneath our feet. Tectonic activity, spanning millions of years, could be the driving force behind mass extinctions.