Nervous System in Relation to Sensitivity of The Body
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Introduction
Sensitivity of the Body All living things perform seven life processes; Movement, Respiration, Sensitivity, Growth, Reproduction, Excretion and Nutrition. Each system of the body has a specific role in each of these actions. In this article we shall discuss sensitivity. The system directly involved in sensitivity is the Nervous system. The nervous system is not one specific system. It includes both the central nervous system and the peripheral nervous system. The central nervous system is located within the brain and spinal cord. The peripheral nervous system is stretched throughout the remainder of the body, connecting the central nervous system to the all of our limbs and organs. Sensitivity in the body covers a wide range of senses; sight, taste, touch, hearing and smell. There are five sense organs in the human body which can be associated with senses known as sensory organs. These five sensory organs each have receptors for the specific stimuli which link to the parts of the nervous system (sensory systems) and by extension, the brain. In addition to these five senses there are a number of other senses that require the use of multiple sensory organs such as pressure or awareness of balance. ...read more.
Middle
Touch Sense of touch originates in the bottom layer of skin known as the dermis. This is filled with a number of tiny nerve endings which receive information about what your body comes into contact with. This information is sent to the spinal cord through the peripheral nervous system, which in turn sends messages to the brain where the feeling is registered. The human body has twenty five variations of nerve endings that all send messages to the brain. (09) Senses; Touch 15/4/11. The most common of these nerve endings detect pain, temperature and pressure. (09) Senses; Touch 15/4/11, (11) Your sense of touch 25/4/11. These sensory receptors cover the entire body, including the skin, epithelia, skeletal bones, muscles, joints, internal organs and the cardiovascular system. Some areas of the body are more sensitive than others. This is determined by the number of nerve endings located there. For example: if you were to bite your tongue, there would be a considerable amount of pain due to the large number of nerve endings that are sensitive to pain found on either side of your tongue. ...read more.
Conclusion
Meaning we have mostly no control over these actions. (16) Autonomic Nervous System 6/5/11. This explains why we are unable to stop our digestive system being active when we are hungry. You could contrast this to how you are able to hold your breath. We cannot stop our body taking actions to gain nutritive materials. The only way to stop our stomach rumbling is to give in and eat. (15) What makes us Hungry pt. 2 6/5/11, (14) Hunger and Eating 6/5/11. When we see, smell or think about food, this stimulates the nerves involved in digestion we will begin producing saliva; one of the first steps to breaking down food into nutrients. Conclusion Sensitivity is a very difficult subject to cover in its entirety. It includes all of our senses and feelings; even some that we may not be directly aware of. The nervous system is found throughout the body. When you begin to look into how we are able to achieve a particular sense, it will prove more complicated with each step you take. You can conclude that the nervous system plays the biggest role in sensitivity. Without our nervous system and by extension our senses; basic human function and survival would not be possible. ...read more.
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