Pharyngeal Arches, Anatomy & Development
Pharyngeal arches develop from the cephalic (head) portion of the neural crest, which is a strip of tissue that runs down the back of the embryo and gives rise to a large number of different organs. Read to know more.
Nivedita Dar24 Jul, 2024
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Pharyngeal Arches - Key Embryonic Tissue that Gives Rise to Numerous Organs. In the embryo, pharyngeal arches, also known as branchial arches, are a series of embryological structures that play a crucial role in the development of head and neck structures in vertebrates. They appear early in the stages of embryogenesis and contribute to the formation of various anatomical structures in the face, neck, and pharynx.
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Development of Pharyngeal Arches
Pharyngeal arches begin to form in the fourth week of embryonic development. There are six arches in total, and they are paired structures that grow on either side of the future head and neck of the developing embryo and fuse at the centerline. These arches develop from the cephalic (head) portion of the neural crest, a strip of tissue that runs down the back of the embryo and gives rise to numerous organs. Pharyngeal arches give rise to cartilage, bone, nerves, muscles, glands, and connective tissue of the face and neck. Each pharyngeal arch consists of a core of mesenchyme surrounded by ectoderm on the outside and endoderm on the inside. The mesenchyme within the arches differentiates into skeletal elements, muscles, nerves, and blood vessels.Read More - Radiodiagnosis
Structure of Pharyngeal Arches
- First Pharyngeal Arch (Mandibular Arch):
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