Thursday, May 04, 2006

The Nose and Its Part

The Proposed Content Outline
A. Subject Name: Science and Health 3
B. Lesson Reference No: Science Around Us 3 p. 10 , Science and Health for a Changing
Environment p. 11 , Science and Health Textbook for Gr. 3 p. 15
PELC 2.1.3 p. 3
C. Lesson Title: The Nose and Its Part
D. Lesson Concept: The nose is the organ for smelling. Without your nose, you cannot
breathe or smell. The nose has the following parts. The nostrils, cilia,
nasal cavity olfactory nerves.
E. Lesson Description :
The lesson makes the student to identify the main parts of the nose and the function of
each part.
The lesson makes the student to explain the important of its part and its function.
The lesson covers the parts of the nose and its function , the healthy tips and the
integration of values in learning concept.
F. Learning Outcome:
At the end of the lesson the student identify the main parts of the nose and the function of each
part.
At the end of the lesson the student explain and report to the class the main parts of the nose
and the function of each part.
At the end of the lesson the student appraise the value of its part and its function.
G. Learning Presentation:
Learning Object 1 - What to know, website link for information . TheNose.http://www.scrollsaws.com/images/Judging/aNose.jpg
Learning Object 2 - What to know, link to e-learning presentation of the teacher in flash, http://kidshealth.org/kid/body/nose_SW.html
H. Learning Activity:
Activity 1 - What to do, read the website link for the on-line discussion.
What is the nose?
One of the most visible organs on the front of your face is the nose. Anatomically, a nose is a vertebrate respiratory organ that covers two nostrils in humans. Nostrils are those two holes visible in the front of the nose, responsible for reception and expulsion of air for respiration purposes. A septum proceeds from deep within the nose near the skull where it's made of thin bony pieces.
There are also hairs in the nose that function to prevent the airborne particles from proceeding into the lungs. Within and behind the nose we find para-nasal sinuses and mucus. As soon as air passes through the pharynx behind the nasal cavity, and proceeds to the entire respiratory system.
Not only does the nose help us breathe, but identifying which perfume smell better than the other is also done best by the nose. A nose helps us distinguish scents that are good and which ones are bad. Although it is not a tasting organ, to a certain extent a nose do contribute to our sense of taste.
Most of us take our sense of smell for granted, because it is not necessary for our survival the way our other senses are... However we still rely on it more than you would probably think.
Smell affects many aspects of life such as attraction, memories, and emotions. Our sense of smell also adds a richness to our lives that we aren't always conscious of, but as soon as it's taken away it dramatically changes our quality of life ask an anosmic (someone who has lost some or all of their sense of smell). Anosmics suffer from depression and their quality of life is severely affected.
Smell is one of the chemical senses and with these sense we sample our environment for information. We are continuously testing the quality of the air we breathe, like for potential dangers such as smoke from fires, or food and flowers.
Although it looks little, a nose is a complicated gateway to the respiratory system that most people find difficult to keep healthy. Colds, hayfever, flu, nasal obstructions, sinusitis and sinus infections are evident to the complexity of the nose.
About 139 million Americans suffer some form of sinus disorder each year. For the purpose of this site, the following nasal disorders will be discussed:
Snoring
Sinusitis
Nasal polyps
Nasal obstruction
Parts of the nose...

The nasal cavity
There is a huge air filled space behind the nose in the middle of the face called nasal cavity that connects with the back of the throat. The nasal cavity is only separated from the inside of your mouth by the palate (the roof of the mouth).
The nasal bone just below the eyes, the maxilla and ethmoid bones circle the nasal cavity. Underneath, the nasal cavity is separated by the palate from the upper mouth. The nose itself covers the front of the nasal cavity, while its back connects straight to the pharynx.
Right on the nasal cavity, there small openings (ostia) that connects to the para-nasal sinuses. When these openings become blocked, mucus drainage is delayed leading to the inflammation of the sinus lining.
On its frontal part, the nasal cavity is divided into two spheres by a septum (a flabby cartilage wall). A septum proceeds from deep within the nose near the skull where it's made of thin bone pieces. There is mucus as well as hair-like structures called cilia on the surface of the nasal cavity that catch and remove germs and dirt from the inhaled air, before it enters the respiratory system.
The most dangerous disease that affects (but rarely does) the nasal cavity is nasal cavity cancer.
Para-nasal sinuses
The skull is one of the heaviest bones in mankind. One may wonder why we are still able to carry it though. The secret is that on its frontal part it has air-filled pockets (sinuses) that lighten the weight of the skull and give resonance to the voice. These sinuses also help filter, moisten and warm the air we inhale before it proceeds to the lungs.
There are four pairs of these air-filled cavities...

Frontal sinuses
Ethmoid sinuses
Maxillary sinuses
Sphenoid sinuses
When the ostia (small tubes attached to the nasal passages for free exchange of mucus and air) become blocked or irritated due to bacteria, virus or other irritants. This infected mucus damages the sinus membrane. Inflammation of these sinuses is called sinusitis. Sinusitis is a severe condition of inflamed sinuses that attacks either acutely, chronically or recurrently.

Activity 2 - What to do see the website link for the on-line simulation activity.
This Classroom Connector addresses Instructional Objective 1.01
SET:
One of our sensory organs is right up front and center of our faces. It is the nose. We will be finding out what parts make up the nose and what the function of each part is.
INSTRUCTION:
The nose is part of the respiratory system. You breathe in air through the nose. The nasal cavity is an air passage that is located behind the nose. It is divided into two parts, a right and left passageway. Heat from the blood vessels in the nasal cavity warms the air as you breathe. Special cells in the nasal cavity wall add moisture to the air you breathe. Because of these blood vessels and special cells, air you inhale is warmed and moistened before it reaches your lungs. There are many tiny hairs inside your nose that trap small specks of dirt. This cleans the air you breathe. Special cells line the inside of the nose. They protect you by warning you if something harmful is in the air, something like smoke or spoiled food. Nerve cells in your nose make you sneeze in a dust-filled room thereby keeping dust from getting deeper inside your body. ACTIVE PARTICIPATION:
Have an assortment of "scents" in separate plastic bags. (Suggestions - lemon, onion, cigarette ashes, ketchup, cinnamon Blindfold students and let them try to guess what the substances are.) CLOSURE:
The nose does what three things to the air that is inhaled? (Cleans, Warms, Moistens)
Activity 3 - What to do to be done off-line, label the illustration of the nose by placing the names
accordingly.
I. Learning Evaluation:
See the website link of the on-line assessment service.
http://www.prongo.com/quizstation/testquiz/
with a class key: prosylagnas and with a classkey password: 1234567
J. Assignment
Answer the following question:
1. What is the sense organ for smelling?______________________
2. The opening of the nose is______________________________
3. These hairs traps the dirt and dust________________________
4.The air passes through_________________________________
5.We know what we smell by means of our____________________
K. Copyright Notice

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