Muscular component of dorsal aoa develops from?
D i.e. Lateral plate mesodermMuscular component of dorsal aoa develops from splanchnopleure (splanchnic/ visceral) layer of laterl plate mesodermQAngioblastic mesenchyme forms early in 3rd week of development from extraembryonic mesenchyme in the splanchno-pleure (splanchnic/ visceral) of yolk sac, in the body stalk (containing allantois), and in the somatopleure of the choroin. The peripheral cells flattens as a vacular endothelium, whereas central cells transform into primitive RBCs.Intra embryonic blood vessels are first seen at endoderm mesenchyme interface within the lateral splanchnic mesenchymeQ at the caudolateral margins of the cranial intestinal poion. Angioblastic competence has been demonstrated with in the ventral (splanchnopleuric) esenchyme with which the endoderm interacts. However, the notochord, prechordal plate and ectodermal tissue do not contain angiogenic cells.The earliest angiogenic mesenchymal cells form blood vessels by vasculogenesis, a process in which new vessels (e.g endothelial hea tubes, dorsal aoae, umbilical and early vitelline vessels) develop in situ. Later vessels develop by angiongenesis, sprouting and branching from the endothelium of pre existing vessels.Somites , derived from paraxial mesenchyme, have been shown to be a source of angioblasts which either differentiate with the somite derivatives or migrate to the neural tube, ventrolateral body wall, limb buds, mesonephros and dorsal >- pa of aoa.
Axial mesoderm
Paraxial mesoderm
Intermediate mesoderm
Lateral plate mesoderm