03 - Anatomy & Physiology - Larynx Flashcards
What composes the Larynx?
(4)
Hyoid Bone
Cartilages
Muscles
Ligaments + Membranes
What are the two types of cartilages in the larynx?
Paired
Unpaired
What are the three PAIRED cartilages?
Arytenoid
Cuneiform
Corniculate
What are the three UNPAIRED cartilages?
Epiglottis
Thyroid
Cricoid
How are the vocal folds positioned?
In a v-shape where the connected section starts at the thyroid/adam’s apple
What is the Thyroid Cartilage composed of?
Two rectangular laminae fused anteriorly in the midline
What is the Thyroid notch?
The incomplete fusion of the two thyroid laminae
What is at the ends of each Thyroid Lamina?
The superior and inferior cornua
What does the Thyroid’s Superior Cornua articulate with?
The greater horns of the hyoid bone
What does the Thyroid’s Inferior Cornua form a joint with?
What kind of joint is it?
What is its name?
Cricoid Cartilage
Synovial joint
Cricothyroid Joint
What is the Epiglottis?
Where is it attached?
Oblong, feather shaped fibroelastic cartilage
Inner surface of the Thyroid Laminae
What is the job of the Epiglottis?
To prevent aspiration during swallowing
What is the Cricoid Cartilage?
Ring shaped cartilage at the bottom of the larynx
What is unique about the Cricoid Cartilage?
It is the only laryngeal cartilage to completely encircle the airway
Where does the Cricoid Cartilage connect?
With the inferior cornua of the thyroid at the cricothyroid joint
Does the Cricoid Cartilage attach to the Trachea?
Where and how?
Yes
The first tracheal ring via membranous attachments
What are the Arytenoids?
Paired cartilages that are shaped like pyramids
Where do the Arytenoids attach?
With the posterior lamina of the cricoid cartilage at the cricoarytenoid joint
What does each Arytenoid have?
(2)
Vocal Process medially
Muscular Process laterally
What is the job of the Arytenoids?
To move the vocal folds together
What is this?
Larynx
A = Epiglottis
B = Hyoid Bone
C = Thyroid Cartilage
D = Cricoid Cartilage
E = Tracheal Cartilages
F = False Vocal Folds (Ventricular Folds)
G = Vocal Folds
What is this?
Thyroid
A = Laryngeal Prominence
B = Superior Thyroid Notch
C = Lamina
D = Superior Horn
E = Inferior Horn
F = Facet for Cricoid
What is this?
Cricoid
A = Arch
B = Cricotracheal Membrane
C = Articulation Facet for Inferior Horn of Thyroid
D = Articulation Facet for Arytenoid Cartilage
E = Cricoid Lamina
F = Articulation Facet for Arytenoid Cartilage
What is this?
Arytenoids
A = Articulating Facet for Corniculus Cartilage
B = Medial Surface
C = Vocal Process
D = Depression for attachment of Vocalis Muscle
