Podcast Beta
Questions and Answers
What is the function of the lower esophageal sphincter (LES)?
Where does chyme pass through after being converted in the stomach?
Which part of the small intestine is around 8 feet long?
What is the primary contribution of the liver to digestion?
Signup and view all the answers
Which organ stores iron and fat-soluble vitamins?
Signup and view all the answers
What is the function of hydrochloric acid in the stomach?
Signup and view all the answers
What is the primary function of the digestive system?
Signup and view all the answers
Which of the following is NOT one of the three pairs of salivary glands?
Signup and view all the answers
What is the primary function of the tongue?
Signup and view all the answers
What is the term used to describe the process of chewing food?
Signup and view all the answers
What is the term used to describe the soft, moist lump of chewed food that is swallowed?
Signup and view all the answers
What is the approximate length of the digestive tract in the average adult?
Signup and view all the answers
What is the primary function of bile produced by the gallbladder?
Signup and view all the answers
Which of the following statements about the pancreas is correct?
Signup and view all the answers
What is the primary function of the villi lining the jejunum and ileum?
Signup and view all the answers
Which of the following nutrients are absorbed by the capillaries within the villi?
Signup and view all the answers
What is the role of the common bile duct in the digestive process?
Signup and view all the answers
What must chyme pass through to get to the duodenum from the bottom of the stomach (antrum)?
Signup and view all the answers
What is the total length of the small intestine?
Signup and view all the answers
Where is bile or gall drained into and where is it stored?
Signup and view all the answers
What is the primary function of bile in the digestive process?
Signup and view all the answers
What are the hair-like protrusions called that line the walls of the jejunum and ileum?
Signup and view all the answers
Which anal sphincter is composed of skeletal muscle and under voluntary control?
Signup and view all the answers
What is the name of the muscular contractions that move food down the esophagus?
Signup and view all the answers
Which nerve carries taste sensation from the anterior two-thirds of the tongue?
Signup and view all the answers
What is the name of the structure that protects the larynx during swallowing?
Signup and view all the answers
Which part of the stomach is responsible for storing ingested food?
Signup and view all the answers
What is the name of the sphincter muscle that controls the passage of food from the esophagus into the stomach?
Signup and view all the answers
Which salivary gland is located below the tongue?
Signup and view all the answers
Study Notes
Digestive System Overview
- The digestive system is a 30-foot long continuous tube that begins at the mouth and ends at the anus
- Functions: digestion of food into nutrients, absorption of nutrients into the bloodstream, and elimination of solid wastes
Mouth and Teeth
- Salivary glands (parotid, sublingual, and submandibular) produce saliva to begin the digestive process
- Teeth used for mastication, food particles mix with saliva to form a bolus for swallowing
- Tongue is covered with taste buds and raised elevations called papillae
Esophagus
- Food is moved down the esophagus by peristalsis (wavelike muscular contractions)
- Lower esophageal sphincter (LES) permits the passage of food
Stomach
- Muscular, expandable organ with upper portion called the fundus and lower portion called the antrum
- Hydrochloric acid and gastric juices convert food to a semiliquid state called chyme
- Chyme passes through the pyloric sphincter valve into the duodenum
Small Intestine
- 21 feet long, 1 inch in diameter, extending from the pyloric sphincter valve to the large intestine
- Divided into duodenum (1 ft), jejunum (8 ft), and ileum (12 ft)
- Villi (hair-like protrusions) slow the passage of food, allowing absorption of nutrients
Liver and Bile
- Liver produces bile, stored in the gallbladder
- Bile helps emulsify fats, making them easier to digest
- Liver also stores iron and fat-soluble vitamins (A, D, E, and K)
Pancreas
- Secretes pancreatic juice containing digestive enzymes and bicarbonate ions into the duodenum
- Pancreatic duct merges with the common bile duct
Large Intestine
- 4-5 feet long, 2.5 inches in diameter
- Functions: absorbs remaining water and nutrients from indigestible food matter, stores wastes, and eliminates waste
- Composed of cecum, ascending colon, transverse colon, descending colon, sigmoid colon, and rectum
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Related Documents
Description
Test your knowledge on the anatomy of the digestive system, focusing on the digestive tract from the mouth to the anus and the functions it performs. Learn about the salivary glands and their role in producing saliva for digestion.
