ALL ABOUT THE NOSE! =D

INTERESTED ABOUT US?

DUNMAN HIGH school FOUR I!<3 a bunch of people highly interested in the functions of our HOLY NOSE.=)

INTRODUCTION

Main structure

The Nose, is an organ of smell, and also part of the apparatus of respiration and voice. It can be divided into an external portion - the visible projection portion, to which the term nose is popularly restricted and an internal portion- consisting of two principal cavities (nasal fossae) separated from each other by a vertical septum, and subdivided by spongy or turbinated bones that project from the outer wall into three passages (meatuses), with which various sinuses in the ethmoid, sphenoid, frontal, and superior maxillary bones communicate by narrow openings.

INSIDE THE NOSE

The margins of the nostrils are usually lined with a number of stiff hairs (vibrissae) that project across the openings and serve as a filter in the passage of foreign substances, such as dust and small insects, which might otherwise be drawn up with the current of air intended for respiration. The skeleton, or framework, of the nose is partly composed of the bones forming the top and sides of the bridge, and partly of cartilages. On either side are an upper lateral and a lower lateral cartilage, to the latter of which are attached three or four small cartilaginous plates, termed sesamoid cartilages. The cartilage of the septum separates the nostrils and, in association posteriorly with the perpendicular plate of the ethmoid and with the vomer, forms a complete partition between the right and left nasal fossae. The nasal fossae, which constitute the internal part of the nose, are lofty and of considerable depth. They open in front through the nostrils and behind end in a vertical slit on either side of the upper pharynx, above the soft palate, and near the orifices of the Eustachian tubes, leading to the tympanic cavity of the ear. In the olfactory region of the nose the mucous membrane is very thick and colored by a brown pigment. The olfactory nerve, or nerve of smell, terminates in the nasal cavity in several small branches; these ramify in the soft mucous membrane and end in tiny varicose fibers that in turn terminate in elongated epithelial cells projecting into the free surface of the nose

FUNCTIONS
The uppermost portion of the human respiratory system, the nose is a hollow air passage that functions in breathing and in the sense of smell. The nasal cavity moistens and warms incoming air, while small hairs and mucous filter out harmful particles and microorganisms. This illustration depicts the interior of the human nose. When smell-producing chemicals come into contact with the upper portion of the nasal passage, the smell is carried by nerve fibres through the roof of the nose into the brain.

Air normally enters the nose where it is:

1. Warmed

2. Filtered from large particles

3. Moistened

These three functions are performed as the air passes over ridges named the Superior, middle and inferior conchea and also as the air passes through the folds between the conchea termed the superior, middle and inferior meatus. All these structures are highly vascularised and moistened by copious amount of mucus. This rich blood supply causes the air to be warmed to almost body temperature. As hot air can contain a higher amount of moisture, the air is also humidified to almost 100% as it passes through the nose. Apart from heating and moistening the air, the conchea produce turbulence in the incoming air. This turbulence would induce any large particles including dust and bacteria, to stick to the mucus. Thus the air is also filtered as it is passing through the nose. This function is complimented by the presence of hairs at the entrance of the nose that trap the very large particles. Apart from the "airconditioning" function, the nose accommodates the sense of smell, through the presence of special neuroepithelium . These sensory nerve endings are stimulated by chemicals that dissolve in the moist coating. Vocal sounds are also produced in the nasal cavity thus aiding in vocalisation.

NOW AREN'T YOU MORE EQUIPPED WITH MORE KNOWLEDGE ON THE NOSE?=)))))

Thursday, March 06, 2008

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HELLO!
this is prida, adding on to hilda's post about how a nose shape determines one's character and personality=)

Bulbous tip: You have a preoccupation with saving.
Small tip: You do not consider money important.
Flared nostrils: You are a big spender and an adventurous risk-taker.
Long nose: Routine work is not your speciality.
Short nose: You have a talent for old-fashioned, hard work; but you crave emotional stability. Broad nose: You have stability and a purposeful nature, and a powerful sex drive. Long and narrow nose: You are intelligent, witty and engaging.
Long and broad nose: You have lots of staying power and concentration.
Fat nose: You are optimistic and are usually good in business.
Ski-jump nose: You are intuitive. Arched: You are elegant and creative.

so yeah!what do you belong to?!
and yeah!what is deviated septum all about?have you ever wondered?>.<
let me tell you now!

A deviated septum is a common physical disorder of the nose, involving a displacement of the nasal septum.

Causes It is most frequently caused by impact trauma, such as by a blow to the face.[1] It can also be a congenital disorder, caused by compression of the nose during childbirth.[1]
The nasal septum is the bone and cartilage in the nose that separates the nasal cavity into the two nostrils. The cartilage is called the quarangular cartilage and the bones comprising the septum include the maxillary crest, vomer and the perpendicular plate of the ethmoid. Normally, the septum lies centrally, and thus the nasal passages are symmetrical. A deviated septum is an abnormal condition in which the top of the cartilaginous ridge leans to the left or the right, causing obstruction of the affected nasal passage. The condition can result in poor drainage of the sinuses. Patients can also complain of difficulty breathing easily, or of sleeping disorders such as snoring or sleep apnea.[2] It is common for nasal septa to depart from the exact centerline; the septum is only considered deviated if the shift is substantial or is adversely affecting the patient. Many people with a deviation are unaware they have it until some discomfort is produced. But by itself a deviated septum can go undetected for years and thus be without any need for correction. Treatment In most cases a deviated septum can be corrected with a minor surgical procedure known as a septoplasty, which enters through the nostrils and cuts away the obtruding matter. The surgery is performed quickly but the patient may take 1-3 weeks to fully recover.

yess,and many korean and hollywood actresses often use deviated septum as a reason for undergoing rhinoplasty!

ok isuppose thats all for today!thankyou!=)

posted at 5:49 AM

end of post

LINKSSSS/BIBLOGRAPHY!=)

'MUCUS`1! =D
'NOSEPICKING! =D
'deviated septum =D
'sneezing =D
'NOSE SHAPE! =D
'MUCUS`2! =D
'air that enters the nose =D
'dog NOSES! =D
'rhinoplasty! =D
'the nose=D
'nose intro =D

thanks to
photoshop 7.0
KIAYI for the codes
PRIDAA for UGLY MAKING OF BLOGSKIN HAHA!
`blogger
`colour codes

Archive
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WELCOME=)
HELLO=)don't you wanna know more about the nose? yes!so.. LETS BE NOSEY.frequent this blog to know more about the nose,this very important organ in our body!ENJOY!^^ =D