Pharyngeal Arches

Question 1

First Pharyngeal Arch

Answer 1

Muscular Contributions - Muscles of mastication, Anterior belly of digastric, Mylohyoid, Tensor tympanic, Tensor veli palatini
Skeletal Contributions - Maxilla, Meckels cartilage, Incus, Malleus
Artery - Maxillary, External carotid
Nerve - Mandibular

Question 2

Second Pharyngeal Arch

Answer 2

Muscular Contributions - Buccinator, Platysma, Muscles of facial expression, Stylohyoid, Posterior belly of digastric, Stapedius
Skeletal Contributions - Stapes, Styloid process, Lesser horn and upper body of hyoid
Artery - Inferior branch of superior thyroid artery, Stapedial artery
Nerve - Facial

Question 3

Third Pharyngeal Arch

Answer 3

Muscular Contributions - Stylopharyngeus
Skeletal Contributions - Greater horn and lower part of hyoid
Endocrine - Thymus, Inferior parathyroids
Artery - Common and internal carotid
Nerve - Glossopharyngeal

Question 4

Fourth Pharyngeal Arch

Answer 4

Muscular Contributions - Cricothyroid, All intrinsic muscles of the soft palate
Skeletal Contributions - Thyroid and epiglottic cartilages
Endocrine - Superior parathyroids
Artery - Right- subclavian artery, Left-aortic arch
Nerve - Vagus

Question 5

Sixth Pharyngeal Arch

Answer 5

Muscular Contributions - All intrinsic muscles of the larynx (except cricothyroid)
Skeletal Contributions - Cricoid, arytenoid and corniculate cartilages
Artery - Right -Pulmonary artery, Left- Pulmonary artery and ductus arteriosus
Nerve - Vagus and recurrent laryngeal nerve