second pharyngeal arch


second pharyngeal arch
in the human embryo, the pharyngeal arch just caudal to the first pharyngeal arch; it later differentiates into the stapes, styloid process of temporal bone, stylohyoid ligament, lesser horn of the hyoid bone, and cranial part of the hyoid bone. Called also hyoid a.

Medical dictionary. 2011.

Look at other dictionaries:

  • Pharyngeal arch — Infobox Embryology Name = Branchial arch Latin = GraySubject = 13 GrayPage = 65 Caption = Schematic of developing fetus with first, second and third arches labeled. Caption2 = Floor of pharynx of human embryo about twenty six days old. System =… …   Wikipedia

  • pharyngeal arch — a segment of the lateral wall of the pharynx that will form jaw and gill structures. The anterior two arches form jaw structures and the following 5 arches form gill structures. Each arch is separated from its neighbours by an endodermal… …   Dictionary of ichthyology

  • second arch cartilages — second pharyngeal arch cartilages Reichert c …   Medical dictionary

  • pharyngeal arches — term used to denote the branchial arches (q.v.) in human embryos. The first and second pharyngeal arches (qq.v.) contribute to the formation of the upper and lower jaws and the hyoid bone. The third pharyngeal arch develops into the greater horn… …   Medical dictionary

  • arch — Any structure resembling a bent bow or an a.; an arc. In anatomy, any vaulted or archlike structure. See arcus. SYN: arcus [TA]. [thru O. Fr. fr. L. arcus, bow] abdominothoracic a. a bell shaped line defined by the lower end of the sternum and… …   Medical dictionary

  • hyoid arch — second pharyngeal a …   Medical dictionary

  • Aortic arch — The aortic arch is the second section of the aorta, the largest artery in the body. The aorta arises from the left ventricle of the heart and first goes up, then bends, and goes down. The part that goes up is termed the ascending aorta, the part… …   Medical dictionary

  • Hyoid bone — Bone: Hyoid bone Hyoid bone. Anterior surface. Enlarged …   Wikipedia

  • cervical sinus — a temporary depression caudal to the second pharyngeal (hyoid) arch, containing the succeeding pharyngeal arches; it is overgrown by the second pharyngeal arch and closes off as the cervical vesicle …   Medical dictionary

  • Digastric muscle — Muscles of the neck. Lateral view …   Wikipedia


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