Smell
Consider any aspect of the human sense of smell and choose any genre (but you can not choose a narrative or argumentative) in which to compose a reflection on the human sense of smell.
Goals
I intend to write a comprehensive paper on the aspects of the human sense of smell.
Identifying and understanding the process of smelling
Identifying the physiological parts involved in smelling.
Animals have five different senses that enable them to function. The sense include, smelling, hearing, seeing, feeling and tasting. All the five senses are important in the manner in which they are of use to animals. Each of the five different senses has a different organ through which it utilizes to carry out its function. Smelling is carried out through the anatomical part known as the nose. In humans, the nose appears as a protrusion form the face (the size varies among different individuals).
Some animals such as dogs have a stronger sense of smell in comparison to other animals such as humans. The nose has features that ensure its smelling function is effectively executed. The nose cleans, warms and moistens air before it is transported to other breathing organs such as the lungs. Transport of fresh air that contains oxygen is very important and important for life to be sustained (Alters 93).
If foul and toxic gases are smelled and breathed into the human body, they might lead to collapse of normal body processes.The sense of smell organ; nose, closely works in close conjunction with other body organs such as the eyes. However, even individuals without the sense of seeing also have effective senses of smelling. In the past, it was thought that blind individuals have better senses for smelling. However, recent studies indicate that they have similar smelling capabilities as individuals with normal eyesight. Smells that are produced by different substances have different vapors which they produce, generate and it is then detected by the receptors in the nose. The nose has membranes that are lined with receptors which are linked to the olfactory nerve.
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The nose has small hairs that filter the air that is breathed in before it is inhaled to other body parts such as the lungs. The airs ensure that no physical obstructions enter through the nose. The lungs need the air that is inhaled to be as clear as possible. After the air moves through the nose, it then moves through a layer of mucous which is found in the olfactory bulb. Smells are identified in this region through nerve cells. The nerve cells communicate with the brain in identifying the smells through the olfactory bulb. The brain usually uses memory to categorize smell as being from good or foul objects. There are seven fundamental smells that assist human beings to identify smells. Camphoric, musky, roses, peppermint, ethereal, pungent, putrid (Campbell 69).
The strength of the human sense of smell is stronger when one is young and the effectiveness reduces as one gets older. Women have a stronger sense of smell in comparison to men. Women are more likely to be able to differentiate between different types of smell in comparison to their male counterparts. Lifestyle habits such as smoking are believed to have a negative effect on the sense of smell. Some physical and psychiatric human conditions are also believed to have a negative effect on the sense of smell. Schizophrenia, depression, anorexia and migraines are some of the physiological and psychiatric conditions that are believed to have a negative effect on the human sense of smell. In some cases, an individual might lose their sense of smell for a while when they have a cold. Zinc supplements have been observed to have a positive effect for individuals whose sense of smell might be ineffective.
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A normal human should be able to tell apart a wide range of smells from about 4,000 to 11, 5000. Some individuals have a defective sense of smell and therefore they cannot be able to properly smell in comparison to normal people. The sense of smell is important as it can assist one to detect imminent danger such as smoke and respond as required. Therefore, individuals with a defective sense of smell face the risk of being trapped in situations where they can encounter breathing problems (Alters 92).
A person with a poor sense of smell might be in a burning house and not smell the smoke until the house catches fire.
Human smell works together with brain memory is an important tool in smelling especially with smell types that are considered as being complex. Evolution of humans in different fields such as cooking and manufacturing different fragrances and chemicals has resulted in the diversification of smells that exist. Individuals that are involved in quality control departments undergo training on classification of different types of smells. Professionals in the hospitality industry such as wine tasters and chefs are also trained in identifying a wide range of smells related to their line of business (Campbell 75).
The brain acts as a great tool in identifying a wide range and a complex number of smells. Although human beings might not have the strongest sense of smell, it can be considered as being the most complex in the animal kingdom. The five senses work in conjunction to promote effectiveness in the way the human body works.
Review of initial goals
I was able to comprehensively review aspects of the sense of smelling in terms of organs involved and the process of smelling.
I have also identified and understood the process involved in smelling.
I have identified the physiological parts involved in smelling.
Conclusion
The sense of smell is one of the most important senses in humans. The nose is the physiological organ that is involved in the function of smelling. The nose breathes in air, purifies, moistens and warms it for it to be transported to internal parts of the body.
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Further research is needed into the actual functions of all the parts associated with the sense of smelling. Currently, scientists remain assumptive about the roles and functions of some parts of the brain and nasal cavity associated with the sense of smelling (Alters 138).
After air is taken in, it is transported through the nose to another part of the nasal passage known as olfactory bulb. The olfactory bulb is lined with membranes and nerve cells that transmit information to the brain which then identifies the smell and categorizes it appropriately. Poor health conditions; physiological and/ or psychiatric can lower the effectiveness of the sense of smelling. Zinc supplements have been observed to have a positive effect on a poor sense of smell in human beings (Campbell 43).
References
Alters, Sandra. Biology: Understanding Life. 2000. Jonnnes& Bartlett; Massachusetts. Print.
Campbell, Bernard. Human Evolution: An Introduction to Mans adaptations. USA. Transaction
books. 1998. Print.
