Larynx Flashcards
Larynx
This a hollow, tubular structure made up of ——— and ——— located on top of the ———
It is a commonly called the ——— because it houses the ———
Larynx
The is a hollow, tubular structure made up of cartilages and muscles located on top of the trachea
It is a commonly called the voice box because it houses the vocal cord
Functions of larynx include
Functions
• Breathing
• Sound production
• Protecting the trachea against food aspiration
Cartilages
• The laryngeal skeleton consists cartilages:
Cartilages
• The laryngeal skeleton consists of nine cartilages:
> Three single (thyroid, cricoid and epiglottis)
• Three paired
(arytenoid, corniculate and cuneiform)
——-Cartilage: The largest of all the laryngeal cartilages (hyaline),
Thyroid
Single Cartilages
Thyroid Cartilage: The largest of all the laryngeal cartilages (hyaline), It is composed of two plate-like ———— that fuse on the anterior border of the cartilage to form a peak, called the ———or ———
It is usually larger in —— than in ——.
Single Cartilages
Thyroid Cartilage: The largest of all the laryngeal cartilages (hyaline), It is composed of two plate-like laminae that fuse on the anterior border of the cartilage to form a peak, called the laryngeal prominence or Adam’s apple.
It is usually larger in males than in females.
Single Cartilages
Thyroid Cartilage: The largest of all the laryngeal cartilages (hyaline), It is composed of two plate-like ———— that fuse on the anterior border of the cartilage to form a peak, called the ———or ———
It is usually larger in —— than in ——.
Single Cartilages
Thyroid Cartilage: The largest of all the laryngeal cartilages (hyaline), It is composed of two plate-like laminae that fuse on the anterior border of the cartilage to form a peak, called the laryngeal prominence or Adam’s apple.
It is usually larger in males than in females.
Cricoid Cartilage:
A complete —— of hyaline cartilage around the trachea to forms the ——— wall of the larynx.
Cricoid Cartilage:
A complete ring of hyaline cartilage around the trachea to forms the inferior wall of the larynx.
Epiglottis: A large, flap, —— -shaped piece of elastic cartilage on the superior part of the larynx.
The epiglottis move down and form a lid over the larynx (lower portion)
closing it off during ———
Epiglottis: A large, flap, spoon-shaped piece of elastic cartilage on the superior part of the larynx.
The epiglottis move down and form a lid over the arynx (lower portion)
closing it off during swallowing
Paired Arytenoid :
These are ——— shaped pieces of hyaline cartilage located at the posterosuperior border of the ——— cartilage.
The most important because they influence the position and tension of the ———.
Paired Arytenoid :
These are triangular pieces of hyaline cartilage located at the posterosuperior border of the cricoid cartilage.
Argienid.
Cartilage
The most important because they influence the position and tension of the vocal folds.
Paired Corniculate:
—— -shaped pieces of elastic cartilage located at the apex of each ——- cartilage.
It serves to prolong them posteriorly and medially
Paired Corniculate:
Horn-shaped pieces of
elastic cartilage located at the apex of each arvtenoid cartilage.
It serves to prolong them posteriorly and medially
Paired
Cuneiform:
—— -shaped pieces of elastic cartilage located anterior to the ——— cartilages.
Paired
Cuneiform:
Club-shaped pieces of elastic cartilage located anterior to the corniculate cartilages.
Intrinsic muscles in the larynx
Intrinsic muscles in the larynx
1.Arytenoid muscle
2. Cricothyroid muscles
3. Cricoarytenoid muscles
4. Thyroarytenoid muscles
5. Vocalis muscles
1.Arytenoid muscle include
Transverse and oblique
1.Arytenoid muscle
•Transverse arvtenoid muscle gunctipm
•Oblique artenoid muscles function
1.Arytenoid muscle
•Transverse arvtenoid muscle adducts the arytenoid cartilages, resulting in adducted vocal folds.
•Oblique artenoid muscles narrow the laryngeal inlet by constricting the distance between the arytenoid cartilages.
Cricothyroid muscles connects the —— to the ——— cartilage.
Function:
Cricothyroid muscles connects the cricoid to the thyroid cartilage.
It lengthens and stretches the vocal folds.
Cricoartenoid muscles include:
Cricoartenoid muscles
“Lateral cricoarytenoid muscles
-Posterior cricoarytenoid muscles .
Cricoartenoid muscles
“Lateral cricoarytenoid muscles function:
-Posterior cricoarytenoid muscles function:
Cricoartenoid muscles
“Lateral cricoarytenoid muscles adduct and internally rotate the arytenoid cartilages, which can result in adducted vocal folds.
-Posterior cricoarytenoid muscles abduct and externally rotate the arytenoid cartilages, resulting in abducted vocal
folds.
4.Thyroarytenoid muscles sphincter of ———
Function:.
4.Thyroarytenoid muscles sphincter of vestibule.
narrowing the laryngeal inlet
Vocalis muscles runs along the ——- hence, increase the thickness of the vocal chords (manipulates —— and —— for phonation)
——— is a fold of membranous tissue that slits across the glottis in the throat (vibrate in the airstream to produce the voice resonation)
Vocalis muscles runs along the vocal chord hence, increase the thickness of the vocal chords (manipulates pitch and volume of sound for phonation)
VC is a fold of membranous tissue that slits across the glottis in the throat (vibrate in the airstream to produce the voice resonation)
Epithelium
It is lined by ———— epithelium except ——— (——— epithelium)
Epithelium
It is lined by ciliated pseudostratified columnar epithelium except vocal cords (stratified squamous epithelium)
Blood supply
• The ——— artery a branch of ——- artery
•——— arteries, a branch of——— artery
Superior laryngeal artery, a branch of superior thyroid artery ( external carotid artery)
Inferior laryngeal artery, a branch of inferior thyroid artery( thyrocervical branch of subclavian artery)
