How does a three-pound mass of wet gray tissue ... there are two types of animals: animals, and animals that have no brains; they are called plants. They don't need a nervous system because ...

The conditions are controlled in two ways with chemical and nervous responses. A bundle of neurones is called a nerve. There are three main types of neurone: sensory, motor and relay. They have ...

(Photo Credit: DigitalVision/Getty Images) This type of brain tissue helps you think fast and walk straight and keeps you from falling. When it becomes diseased, the myelin breaks down. The ...

The development of the nervous system is the ongoing biological process through which nervous tissue is generated and shaped in an embryo and in postnatal and adult organisms. Understanding the ...

They do so with nervous system tissue that imitates electrical wiring. The nervous system is comprised of two primary cell types: neurons and glial cells. These cells communicate with each other ...