Skip to main content
Ch. 23 The Digestive System
Marieb - Human Anatomy & Physiology 11th Edition
Marieb, Hoehn11th EditionHuman Anatomy & PhysiologyISBN: 9780136874034Not the one you use?Change textbook
All textbooksMarieb, Hoehn 11th EditionCh. 23 The Digestive SystemProblem 18
Chapter 23, Problem 18

Make a simple line drawing of the organs of the alimentary canal and label each organ. Then add three labels to your drawing—salivary glands, liver, and pancreas—and use arrows to show where each of these organs empties its secretions into the alimentary canal.

Verified step by step guidance
1
Begin by sketching a simple outline of the main organs of the alimentary canal in order: start with the mouth, then the pharynx, followed by the esophagus, stomach, small intestine (divided into duodenum, jejunum, and ileum), large intestine (including cecum, colon, rectum), and finally the anus.
Label each organ clearly on your drawing to identify the path food takes through the digestive system.
Next, add the salivary glands near the mouth. These include the parotid, submandibular, and sublingual glands. Draw arrows from these glands pointing to the mouth to indicate where saliva is secreted.
Add the liver above the stomach area and draw the gallbladder beneath it. Then, draw an arrow from the liver (via the bile duct) and gallbladder pointing to the duodenum, the first part of the small intestine, showing where bile enters the alimentary canal.
Finally, add the pancreas behind the stomach and draw an arrow from the pancreas to the duodenum as well, indicating where pancreatic secretions enter the alimentary canal to aid digestion.

Verified video answer for a similar problem:

This video solution was recommended by our tutors as helpful for the problem above.
Video duration:
2m
Was this helpful?

Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Alimentary Canal Organs

The alimentary canal is a continuous tube through which food passes and digestion occurs. Key organs include the mouth, pharynx, esophagus, stomach, small intestine, large intestine, and anus. Understanding their order and function is essential for accurately drawing and labeling the digestive tract.
Recommended video:
Guided course
05:04
The Levels of Organization

Accessory Digestive Organs

Salivary glands, liver, and pancreas are accessory organs that produce secretions aiding digestion but are not part of the alimentary canal itself. These organs release enzymes and other substances into specific points of the canal to facilitate breakdown and absorption of nutrients.
Recommended video:
3:21
Accessory Organs

Sites of Secretion Entry

Each accessory organ empties its secretions into particular locations in the alimentary canal: salivary glands into the mouth, the liver via the bile duct into the small intestine, and the pancreas also into the small intestine. Knowing these entry points is crucial for correctly placing arrows in the drawing.
Recommended video:
01:33
Protein Secretion
Related Practice
Textbook Question

Trace the path of a single protein molecule that has been ingested.

The protein molecule will be digested by enzymes made by

a. The mouth, stomach, and colon

b. The stomach, liver, and small intestine

c. The small intestine, mouth, and liver

d. The pancreas, stomach, and small intestine

816
views
Textbook Question

Lara was on a diet but she could not eat less and kept claiming her stomach had a mind of its own. She was joking, but indeed, there is a 'gut brain' called the enteric nervous system. Is it part of the parasympathetic and sympathetic nervous system? Explain.

772
views
Textbook Question

Trace the path of a single protein molecule that has been ingested.

The protein molecule must be digested before it can be transported to and utilized by the cells because

a. Protein is only useful directly

b. Protein has a low pH

c. Proteins in the circulating blood produce an adverse osmotic pressure

d. The protein is too large to be readily absorbed

774
views
Textbook Question

Describe the two phases of swallowing, noting the organs involved and the activities that occur.

73
views
Textbook Question

a. Describe the boundaries of the oral cavity.

b. Why do you suppose its mucosa is stratified squamous epithelium rather than the more typical simple columnar epithelium?

108
views
Textbook Question

Trace the path of a single protein molecule that has been ingested.

Before the blood carrying the products of protein digestion reaches the heart, it first passes through capillary networks in:

a. The spleen

b. The lungs

c. The liver

d. The brain

100
views