Pharyngeal arches & pharyngeal poches and their derivatives

#pharyngeal Arches#pharyngeal pouches# derivatives of pharyngeal Arches and pouches##

1. PHARYNGEAL APPARATUS

Pharyngeal / Branchial apparatus consists of..

e 6 Pharyngeal Arches - 5" Arch disappears
e 4 Pharyngeal Clefts - only 1* Cleft remains
e 4 Pharyngeal Pouches

2. Ruptured
buccopharyngeal membrane

Laryngotracheal groo

3. DERIVATIVES OF PHARYNGEAL ARCHES
FIRST (MANDIBULAR) ARCH DERIVATIVES :-
Skeletal Elements :-

+ Malleus

+ Incus

+ Anterior ligament of malleus
+ Spheno-mandibular ligament
+ Body of the Mandible

Muscles :-

+ Muscles of mastication
+ Tensor tympani

Tensor veli palatini
Anterior belly of digastric
+ Mylohyoid

Artery :-
+ Maxillary Artery
Nerve :-

+ Mandibular Nerve
+ Chorda tympani nerve

4. SECOND (HYOID) ARCH DERIVATIVES :-
Skeletal Elements :-

e Stapes

e Styloid process

+ Stylo-hyoid ligament

e Lesser cornu of Hyoid bone

+ Upper part of body of Hyoid bone

Muscles :-

+ Stapedius

+ Stylohyoid

e Muscles of Facial expression
+ Auricular muscles

e Epicranius muscle

+ Posterior belly of Digastric

e Platysma

Artery :-
+ Stapedial Artery
Nerve :-

+ Facial Nerve

5. THIRD ARCH DERIVATIVES :-
Skeletal Elements :-

+ Greater cornu of Hyoid bone
+ Lower part of body of Hyoid bone

Muscle :-
e Stylopharyngeus
Arteries :-

+ Common Carotid Artery
+ Internal Carotid Artery

Nerve :-

e Glossopharyngeal Nerve

6. FOURTH ARCH DERIVATIVES :-
Skeletal Element :-

e Lamina of Thyroid cartilage
Muscle :-

e Cricothyroid
Arteries :-

e Right Subclavian Artery
e Arch of Aorta

Nerve :-

e Superior Laryngeal Nerve (External Laryngeal
Nerve)

7. SIXTH ARCH DERIVATIVES :-
Skeletal Elements :-

e Cricoid cartilage
e Arytenoid cartilage

Muscles :-

e Intrinsic muscles of Larynx (Except
Cricothyroid)

Arteries :-

e Right & Left Pulmonary Arteries
+ Ductus Arteriosus

Nerve :-

e Recurrent Laryngeal Nerve