Summary
Summary Upper Respiratory System Anatomy
- Course
- Institution
Concise summary for upper respiratory system anatomy - first year med school
[Show more]
Seller
Follow
Tyandra
Content preview
Upper Respiratory SystemWednesday, October 19, 2022 10:56 PM
Functions
• Provide area for gas exchange between air and circulating blood
• Move air from and to exchange surfaces of lungs
• Defend respiratory system & other tissues (upper respiratory system)
• Produce sounds
Components
1. Upper Respiratory System: nose, nasal cavity, paranasal sinuses, pharynx
a. Filters, warms & humidifies air
2. Lower Respiratory System: larynx, trachea, bronchi, lungs
3. Conducting portion: entrance → nasal cavity …→ smallest bronchioles
4. Respiratory portion: respiratory bronchioles + alveoli
Respiratory Epithelium
• Pseudostratified, ciliated, columnar epithelium, goblet cells
• Except finest conducting portions + alveoli
• Sticky mucus bathes exposed surfaces - mucous & goblet cells
• Nasal cavity: cilia sweeps debris/microorganisms into pharynx …swallowed
Nose
• Nose has connections with orbits, cranial cavity, paranasal sinuses
• Air enters - external nares
• Vestibule
○ Portion of nasal cavity contained with flexible tissues of external nose
○ Hairs to trap foreign particles
• Nasal septum
○ Divides cavity = left & right
○ Bony portion = perpendicular plate of ethmoid & vomer
○ Hyaline cartilage covers anterior
Nasal Cavity
• Nares → Choana
• Leads to nasopharynx
• Lined by mucosa except for [vestibule]
○ Skin & hair
• 3 regions
○ Vestibule
○ Inferior (respiratory area)
○ Superior (olfactory area)
• Lateral wall
○ Vestibule → Conchae/Turbinate (superior, middle, inferior)
○ Meatuses beneath conchae
○ Conchae + Meatuses - lined with mucous membrane
▪ ↑ S.A
▪ Prevents dehydration by trapping water droplets during breathing
• Ducts of paranasal sinuses & nasolacrimal ducts communicate with cavity
Conchae & Meatuses
Conchae: forces air to flow steady around largest surface of cilia
1. Superior
2. Middle: projections = ethmoidal bulla
3. Inferior: receives nasolacrimal duct
Paranasal Sinuses
Air filled cavities form by bones of skull - lined with mucus
membrane & ciliated, communicate with nasal cavity via meatuses
1. Frontal sinus
2. Ethmoid sinus
3. Maxillary sinus
4. Sphenoid sinus
Pharynx
• Internal nares → entrance of pharynx & esophagus
• Nasopharynx, oropharynx, laryngopharynx
• = skeletal muscle lined with mucous membrane
• At boundary between naso and oropharynx
Respiratory epithelium → Stratified squamous epithelium
Anatomy Page 1
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Tyandra. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $5.50. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
69605 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 15 years now