1st Branchial arch or the Mandibular arch

What is the 1st Branchial arch also known as?

a) Mandibular arch
b) Maxillary arch
c) Hyoid arch
d) Bronchial arch

Answer:

a) Mandibular arch

The 1st branchial arch, also known as the Mandibular arch, is an embryonic structure that forms the lower jaw or mandible. It consists of a horizontal body and a vertical ramus, with important landmarks such as the mental foramen and mandibular foramen.

The Mandibular arch plays a crucial role in the development of the face and skull. It is responsible for forming the lower jaw, which is essential for functions like chewing, speaking, and facial aesthetics.

Key structures within the Mandibular arch include the mental foramen, which allows for the passage of nerves and blood vessels to the lower lip and chin, and the mandibular foramen, through which the inferior alveolar nerve and blood vessels enter the mandibular canal to supply sensation to the teeth.