The brain is the largest organ that coordinates most body activities through nervous tissue composed of neurons that form the brain, spinal cord, and nervous system. This system works with the brain located in the head's cranial cavity to receive sensory information and direct the body's responses by sending electrical signals through networks of nerves throughout the entire body.

1. Biology of the Brain By: Regina Pappas

2. The Brain The brain is one of the largest organs and coordinates most body activities.

3. Nervous Tissue Tissue is formed when like cells are grouped together and function together to perform specific activity. Nervous tissue is composed of cells called neurons. This tissue forms the brain, spinal cord, and a network of nerves throughout the entire body. This allows electrical impulses to send information between the brain and the rest of the body.

4. Nervous System and the Brain Organs are composed of several different types of tissue that work as a unit to perform special functions. A system is composed of several organs working in a coordinated manner to perform a complex function. The nervous system makes up the brain, spinal cord, and nerves; in which they work together to receive sensory information and coordinates the body’s response.

5. Region and Cavity The brain is located in the cephalic region of the body, which contains the entire head The dorsal cavity includes the cranial cavity, where the brain is located; as well as the spinal cavity; where the spinal cord is located.