There are four basic tissue types such as epithelial tissue, connective tissue, muscle tissue, and nervous tissue which construct Humans and other large multicellular animals. The straight forward answer is that nervous tissue coordinates, regulates and integrates body functions. This tissue stimulates both external and internal senses of animal body and thereby, transmitting information by processing. Neurons and gila are two basic functions of nervous system. Neurons convey information from long distances through generating electrical signals, while gila plays the supporting roles.
In order to accommodate these functions, cells sculpts epithelial sheets into tissues and organs with unique bends, folds, and curves. The concept of hypothalamus has been developed recently in neurobiology which shows a functional map establishing a causal relationship among respiration, sleep, and stress and various physiological processes. The internal balance and external demands are maintained through the complex process of diverse stimuli.