Nose

1. Nose 3.03 Remember the structures of the sensory system

2. The Nose • YOUR NOSE • Smell accounts for 90% of taste • The tissue in your nose is called olfactory epithelium. It contains specialized nerve cell receptors. • Those receptors stimulate the OLFACTORY NERVE to the brain. http://www.mortgagefinders.co.uk/animation/animated_dog.gif

3. Structures of the nose Nares Nasal cilia Nasal septum Olfactory receptors Turbinates 3.03 Remember the structures of the sensory system

4. Structures of the nose 3.03 Remember the structures of the sensory system

5. Structures of the nose Olfactory area 3.03 Remember the structures of the sensory system

6. olfactory nerve - cranial nerve I- is the shortest of the cranial nerves and is very important in the sense of smell. Located in the top of the nasal cavity. Contains only sensory nerve tissue- no motor nerves! Discuss the structures of the nose in relation to the olfactory nerve. 3.03 Remember the structures of the sensory system

7. 3.04 Functions and disorders of the nose 3.04 Understand the functions and disorders of the sensory system

8. Understanding the functions of the nose Smell 3.04 Understand the functions and disorders of the sensory system

9. Understanding the functions of the nose • Nares (nostrils) • Nasal cilia 3.04 Understand the functions and disorders of the sensory system

10. Understanding the functions of the nose Nasal septum Olfactory receptors - Smell depends on sensory receptors that respond to airborne chemicals Turbinate - a long, narrow and curled bone shelf that protrudes into the breathing passage of the nose. 3.04 Understand the functions and disorders of the sensory system

11. Smell Trivia… Did you know??? Perfume • The beginnings of perfume use can be traced back thousands of years to the early Egyptians. • Burning of resins and woods were used for their fragrance during religious ceremonies. • Perfume was developed to attract the goodwill of the gods. • When Tutankhamen’s tomb was discovered, there was still a trace of the strong fragrance detected. He was buried over 3,300 years ago. 3.04 Understand the functions and disorders of the sensory system

12. Disorders of the nose Deviated nasal septum What causes a deviated nasal septum? What is its impact on health? How does a septoplasty relieve symptoms? 3.04 Understand the functions and disorders of the sensory system

13. the nasal septum is off center, making one nasal passage smaller. it can block one side of your nose and reduce airflow, causing difficulty breathing and nosebleeds Treatment of nasal obstruction may include medications or adhesive strips to manage symptoms. But to correct a deviated septum, surgery is necessary- septoplasty. 3.04 Understand the functions and disorders of the sensory system

14. What are nasal polyps? Nasal polyps are sac-like growths of the nose nasal or sinuses. What causes nasal polyps? Polyps develop from chronic inflammation of the nasal mucosa. How are they treated? Nasal polyps are most often treated with steroids and/or surgery.

15. Disorders of the nose Rhinitis Inflammation of the nasal mucus membrane is called rhinitis. Rhin- -itis 3.04 Understand the functions and disorders of the sensory system

16. What causes rhinitis? Rhinitis is commonly caused by a viral or bacterial infection, including the common cold, which is caused by Rhinoviruses and Coronaviruses, or bacterial sinusitis What are the symptoms? Common symptoms of rhinitis are a stuffy nose, runny nose, and post-nasal drip. How is rhinitis treated? Rhinitis can't be cured but it can be controlled by: Avoiding rhinitis triggers. Using home remedies such as nasal irrigation. Taking over-the-counter and prescription medications. 3.04 Understand the functions and disorders of the sensory system

17. 3.04 Functions and disorders of the nose The End 3.04 Understand the functions and disorders of the sensory system