The Pharynx The pharynx is a musculomembranous tube which is used by the digestive system as well as the respiratory system. Location:The pharynx is placed behind the nasal cavities,the mouth and the larynx.It extends from the base of the skull to the level of the sixth cervical vertebra where it becomes the esophagus.The cricoid cartilage marks this change on the front of the neck. Division:For descriptive purposes the pharynx is divided into three parts:nasopharynx,oropharynx and laryngopharynx
The Pharynx The pharynx is a musculomembranous tube which is used by the digestive system as well as the respiratory system. Location: The pharynx is placed behind the nasal cavities, the mouth and the larynx. It extends from the base of the skull to the level of the sixth cervical vertebra where it becomes the esophagus. The cricoid cartilage marks this change on the front of the neck. Division: For descriptive purposes the pharynx is divided into three parts: nasopharynx, oropharynx and laryngopharynx
The Esophagus Location:it is located behind the trachea.It passes down through the lower part of the neck and the superior and posterior parts of the mediastinum,pierces the diaphragm at the level of the tenth thoracic vertebra,and ends at the cardiac orifice of the stomach.It is a narrowest portion of the alimentary canal except for the vermiform appendix. Constrictions: -its commencement,15 cm from the incisor teeth. -where is crossed by the left bronchus,25 cm from the incisor teeth. -where it passes through the diaphragm,40 cm from the incisor teeth
The Esophagus Location: it is located behind the trachea. It passes down through the lower part of the neck and the superior and posterior parts of the mediastinum, pierces the diaphragm at the level of the tenth thoracic vertebra, and ends at the cardiac orifice of the stomach. It is a narrowest portion of the alimentary canal except for the vermiform appendix. Constrictions: ▪its commencement, 15 cm from the incisor teeth. ▪where is crossed by the left bronchus, 25 cm from the incisor teeth. ▪where it passes through the diaphragm, 40 cm from the incisor teeth
