Which cells form cartilage, bone, and connective tissue of the pharyngeal arches?

Which cells form cartilage, bone, and connective tissue of the pharyngeal arches?

• A. Neural Crest Cells
• B. Paraxial Mesoderm
• C. Endoderm
• D. Ectoderm

Answer: (A)

Neural crest cells are responsible for forming cartilage, bone, and connective tissue in the pharyngeal arches. These cells originate at the border of the developing neural tube, migrate into the arches, and differentiate into ectomesenchyme that builds the skeletal elements and surrounding connective tissues of the face and neck. The arches’ internal lining comes from endoderm and their outer covering from ectoderm, while paraxial mesoderm mainly contributes to muscles and some other structures, but the cartilage and bone of the arches originate predominantly from neural crest cells.

Neural crest cells are responsible for forming cartilage, bone, and connective tissue in the pharyngeal arches. These cells originate at the border of the developing neural tube, migrate into the arches, and differentiate into ectomesenchyme that builds the skeletal elements and surrounding connective tissues of the face and neck. The arches’ internal lining comes from endoderm and their outer covering from ectoderm, while paraxial mesoderm mainly contributes to muscles and some other structures, but the cartilage and bone of the arches originate predominantly from neural crest cells.