Second pharyngeal arch

Second pharyngeal arch
Head end of human embryo, about the end of the fourth week.
Floor of pharynx of embryo. (Second arch visible near center.)
Anatomical terminology

The hyoid arch (or second branchial arch) assists in forming the side and front of the neck.

Derivatives

Skeletal elements

From the cartilage of the second arch arises

• Stapes,

• Styloid process,

• Stylohyoid ligament, and

• Lesser cornu of the hyoid bone.

Muscles

• Muscles of face

• Occipitofrontalis muscle

• Platysma

• Stylohyoid muscle

• Posterior belly of Digastric

• Stapedius muscle

• Auricular muscles

Nerve supply

Facial nerve

Additional images

• 
  Human embryo from thirty-one to thirty-four days

External links

• plastic/216 at eMedicine
• Overview at howard.edu
• Mnemonic:Second branchial arch

This article incorporates text in the public domain from page 66 of the 20th edition of Gray's Anatomy (1918)