Chapter 25: Respiratory System - Models Review

Frontal Sinus (The sinus in FRONT; The first of two parts of the paranasal sinuses)

Nasal Cavity

Pharynx (The tube that runs From the nose to mouth)

Sphenoidal Sinus (The sinus in SPHENOID bone; The second of two parts of the paranasal sinuses)

Parts of the U.R.T

1. Nose

2. Nasal Cavity

3. Paranasal Sinuses

4. Pharynx

Frontal Sinus (The first of two parts of the paranasal sinuses)

E. Superior N.C

F. Middle N.C

G. Inferior N.C

H. Vestibule

I. Superior meatus

J. Middle meatus

K. Inferior meatus

Nasopharynx

Oropharynx

Laryngopharynx

Lower Respirtory Tract: Larynx

Functions:

1. Passageway for air

2. Prevents materials to enter respiratory tract -> choking

3. Sound for speech

4. Increase pressure in abdominal cavity

5. Helps with sneezes & coughs

Lower Respiratory Tract: Larynx - Connect ____ to ____ .

Connects pharynx to trachea

Larynx “missing”

Bronchial Tree: - bronchi turns into bronchioles then respiratory bronchioles

-bronchi closest to trachea = primary then becomes 2ndary > tertiary > smaller

Bronchi

Bronchioles

Respiratory Bronchioles

NOT exact in model

-respiratory bronchioles are those that then branch into:

1. Alveolar ducts

then:

2. Alveoli

**if the bronchiole ENDS /

Doesn’t branch into alveolar duct, it is a terminal bronchiole**

Functions for Lower Respiratory Tract: Larynx

1. Passageway for air

2. Prevents materials to enter respiratory tract -> choking

3. Sound for speech

4. Increase pressure in abdominal cavity

5. Helps with sneezes & coughs

• Voice box

• Connects pharynx to trachea

Pharynx

Hyoid bone

Epiglottis

Thyrohyoid membrane *missing

Thyroid cartilage

On the ANTERIOR view, this would be the laryngeal prominence (Adam’s apple)

Cricoid cartilage

Tracheal cartilage

Trachea

1. _____ -> 2. ____ -> 3. ____

Larynx -> Trachea -> Bronchi

L.R.T.: Trachea composed of _________ cartilage

thyroid cartilage

Larynx

Cricoid cartilage

rings of tracheal cartilage (C-shaped) alternate with anular ligament

Trachea

Right main bronchus

Left main bronchus

Carina: bottom of the “split”

L.R.T.: Bronchioles -> Alveoli

Conducting Pathway:

Bronchiole ->

Terminal bronchiole ->

Respiratory bronchiole ->

Alveolar ducts ->

Alveolar sac ->

Alveoli (where respiration occurs)

Bronchiole

Terminal bronchiole

Respiratory bronchiole

Alveolar duct

Alveoli

Branch of pulmonary vein

Branch of pulmonary artery

Arteriole

Capillary beds

Connective Tissue