The Nervous System is equipped with several structures that allows it to sense and respond to stimulus from within the body and from the external environment. The Nervous System is very important for the maintenance of homeostasis, since it regulates the body structures and processes by monitoring and controlling them.
The human Nervous System is one of the most complex systems in the environment. It is composed by the brain, spinal cord, and the nerves.
The Nervous System is divided in two different systems: Central Nervous System (brain and spinal cord, receive, processes, and send information) and Peripheral Nervous System (nerves, carry sensory information to the CNS, and send information from the CNS to muscles and glands). The PNS is also divided into different divisions.
The Nervous System is composed by two special cells: Neurons and Glial cells. Neurons are the basic structural and functional units of the nervous system. They are responsible to respond to any physical or chemical stimuli, conduct electrochemical signals, and release chemicals.
The activity of the neuron is supported by Glial cells, that are responsible for nourishing the neurons, cleaning the waste and protect them from infections.
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