16 Questions
Where does the digestive system tract start?
Oral cavity
Where does the laryngeal pharynx regionally situate?
Behind the inlet of the larynx
Which organ is not part of the various accessory organs of the digestive system?
Kidneys
Which part of the pharynx extends from the base of the skull till the lower limit of the soft palate?
Nasopharynx
What is the location of the upper end of the pharynx?
Just below the lower surface of the skull (skull base)
Where is the lower end of the pharynx located?
At the level of cricoid cartilage
Where does the laryngopharynx extend to?
Level of the epiglottis to the level of C6
What lies between the base of tongue and epiglottis in the oropharynx?
Valleculae
Where does the hypopharynx begin and end?
Begins at the level of the hyoid bone and ends at C6
What is the function of the esophagus?
Transports food from the pharynx to the stomach
Where does the esophagus originate and where does it end?
Originates at C6 and ends at T11
Where is the pharyngeal opening of the Eustachian tube located?
In the center of the lateral wall
What structures separate the laryngopharynx from the carotid sheath?
Styloid process and styloid muscle
What lies between the posterior margin of Eustachian tube and posterior wall of nasopharynx?
Fossa of Rosenmüller
What is included in the subsites of oropharyngeal tissues?
Base of tongue, tonsillar complex, soft palate, pharyngeal wall
What space lies between base of tongue/lingual tonsils and palatine tonsils?
Glossotonsillar sulci
Study Notes
Digestive System Tract
- The digestive system tract starts at the mouth.
Pharynx
- The laryngeal pharynx regionally situates in the lower part of the throat.
- The upper end of the pharynx is located at the base of the skull.
- The lower end of the pharynx is located at the cricoid cartilage.
- The pharynx extends from the base of the skull to the cricoid cartilage.
- The nasopharynx extends from the base of the skull to the lower limit of the soft palate.
- The oropharynx extends from the lower limit of the soft palate to the upper edge of the epiglottis.
- The laryngopharynx extends from the upper edge of the epiglottis to the cricoid cartilage.
- The epiglottis lies between the base of tongue and the entrance of the larynx in the oropharynx.
- The hypopharynx begins at the upper edge of the epiglottis and ends at the cricoid cartilage.
Esophagus
- The esophagus is a muscular tube that helps in the passage of food from the pharynx to the stomach.
- The esophagus originates at the cricoid cartilage and ends at the cardiac sphincter.
- The function of the esophagus is to transport food and liquids to the stomach.
Other Structures
- The pharyngeal opening of the Eustachian tube is located in the lateral wall of the nasopharynx.
- The carotid sheath is separated from the laryngopharynx by the middle constrictor muscle and the alar fascia.
- The salpingopharyngeal fold lies between the posterior margin of the Eustachian tube and the posterior wall of the nasopharynx.
- The oropharyngeal tissues include the tonsillar region, the base of the tongue, and the soft palate.
- The space between the base of the tongue/lingual tonsils and the palatine tonsils is called the tonsillar fossa.
Test your knowledge of the gastrointestinal tract, salivary glands, liver, pancreas, gall bladder, pharynx, and esophagus gross anatomy with this quiz focused on the lecture series by Dr. Rofayda Gaafar, MD.
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