Essay On Central Nervous System

The nervous system is composed of two main parts which are the central nervous system and the peripheral nervous system. The central nervous system includes the brain and nerve cords like the spinal cord while the peripheral nervous system includes the motor nerves and sensory nerves. There are two main types of support cells in the nervous system which are glial cells and neurons. The neurons' function in the system is to receive and send electrical signals. The glial cells provide insulation and regulation to neurons. Some examples of the glial cells are astrocytes and oligodendrocytes. There are three main types of neurons which are composed of sensory neuron, motor neuron, and interneuron. All three neurons are made up of dendrites, cell bodies, and axons. The sensory neurons detect sensory information from the outside environment and are the main factors that make up the five senses such as smell and taste. Nervous tissues form a …show more content…
Not only that, nicotine can also affect your thyroid hormones, pituitary hormones, sex hormones and adrenal hormones.It constricts blood vessels, increasing the blood pressure and stimulating the heart, and raises the blood fat levels. What the nicotine actually has, is it is all just poison if you really think about it and examine what one single cigarette has in it's ingredients. Cigarette smoke is a combination of lethal gases, carbon monoxide, hydrogen cyanide, and nitrogen and sulfur oxides and tars, which contain an estimated 4,000 chemicals all in one. If you actually think about it an injection of these chemicals put together even one drop would be deadly. Nicotine can lead to addiction and towards worse remedies many people might not know but why put your body at risk why not prevent it and live life on the safe side and be