<prompt> Persistent part of the envelope of Meckels cartilage is:Stylomandibular ligamentTemporomandibular ligamentSphenomandibular ligamentStylohyoid ligament  <response>: Bone begins to develop lateral to Meckel cartilage during the seventh week and continues until the posterior aspect is covered with bone. Ossification stops at the point that will later become the mandibular lingula, and the remaining part of Meckels cartilage continues on its own to form the sphenomandibular ligament and the spinous process of the sphenoid. The part of Meckels cartilage that has been encapsulated with bone appears to have served its purpose as a splint for the intramembranous ossification, and it largely deteriorates.Key Concept:Persistent part of the envelope of Meckels cartilage is sphenomandibular ligament. 