Textbook Question
Label the four layers of the digestive tract in the following figure.
a. ___
b. ___
c. ___
d. ___
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Ch. 24 The Digestive System
Martini, Nath, Bartholomew11th EditionFundamentals of Anatomy & PhysiologyISBN: 9780136874089
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Table of contents
- Ch. 1 An Introduction to Anatomy and Physiology26
- Ch. 2 The Chemical Level of Organization34
- Ch. 3 The Cellular Level of Organization30
- Ch. 4 The Tissue Level of Organization24
- Ch. 5 The Integumentary System17
- Ch. 6 Bones and Bone Structure36
- Ch. 7 The Axial Skeleton11
- Ch. 8 The Appendicular Skeleton17
- Ch. 9 Joints13
- Ch. 10 Muscle Tissue12
- Ch. 11 The Muscular System28
- Ch. 12 Nervous Tissue18
- Ch. 13 The Spinal Cord, Spinal Nerves, and Spinal Reflexes22
- Ch. 14 The Brain and Cranial Nerves20
- Ch. 15 Sensory Pathways and the Somatic Nervous System17
- Ch. 16 The Autonomic Nervous System and Higher-Order Functions30
- Ch. 17 The Special Senses16
- Ch. 18 The Endocrine System20
- Ch. 19 Blood31
- Ch. 20 The Heart31
- Ch. 21 Blood Vessels and Circulation29
- Ch. 22 The Lymphatic System and Immunity31
- Ch. 23 The Respiratory System12
- Ch. 24 The Digestive System18
- Ch. 26 The Urinary System31
- Ch. 27 Fluids & Electrolytes32
- Ch. 28 The Reproductive System12
- Ch. 29 Development and Inheritance23
Martini, Nath, Bartholomew11th EditionFundamentals of Anatomy & PhysiologyISBN: 9780136874089Not the one you use?Change textbook
Chapter 24, Problem 7
Most of the digestive tract is lined by_____epithelium.
(a) pseudostratified ciliated columnar
(b) cuboidal
(c) stratified squamous
(d) simple
(e) simple columnar
Verified step by step guidance1
Step 1: Understand the types of epithelial tissue listed in the options. Each type has specific locations and functions in the body. For example, pseudostratified ciliated columnar epithelium is typically found in the respiratory tract, cuboidal epithelium is common in glands and ducts, stratified squamous epithelium is found in areas subject to abrasion, simple epithelium refers to a single layer of cells, and simple columnar epithelium is often involved in absorption and secretion.
Step 2: Recall the primary function of the digestive tract lining, which includes absorption of nutrients and secretion of digestive enzymes and mucus. This function requires a type of epithelium that facilitates these processes efficiently.
Step 3: Identify which epithelial type is best suited for absorption and secretion in the digestive tract. Simple columnar epithelium is known for these roles and is commonly found lining most of the digestive tract, including the stomach and intestines.
Step 4: Eliminate options that do not fit the digestive tract lining based on their typical locations and functions. For example, pseudostratified ciliated columnar epithelium is mainly in the respiratory tract, and stratified squamous epithelium is found in the mouth and esophagus where protection against abrasion is needed.
Step 5: Conclude that the most appropriate answer is the epithelium type that lines most of the digestive tract, which is simple columnar epithelium.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Types of Epithelial Tissue
Epithelial tissues are classified based on cell shape and layering, including simple (single layer) and stratified (multiple layers) types. Common shapes are squamous (flat), cuboidal (cube-shaped), and columnar (tall). Understanding these types helps identify their functions and locations in the body.
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07:25
Identifying Types of Epithelial Tissue Example 1
Epithelial Lining of the Digestive Tract
Most of the digestive tract, especially from the stomach to the intestines, is lined by simple columnar epithelium. This type facilitates absorption and secretion, essential for digestion. The esophagus, however, has stratified squamous epithelium to protect against abrasion.
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03:41Simple Epithelial Tissues Example 2
Function and Adaptation of Epithelial Types
Different epithelial types serve specific roles: simple columnar epithelium aids nutrient absorption and mucus secretion, while stratified squamous epithelium provides protection in high-friction areas. Recognizing these functions clarifies why certain epithelia line particular digestive regions.
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07:25Identifying Types of Epithelial Tissue Example 1
Related Practice
Textbook Question
Bile release from the gallbladder into the duodenum occurs only under the stimulation of
(a) Cholecystokinin
(b) Secretin
(c) Gastrin
(d) Enteropeptidase
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Textbook Question
Regional movements that occur in the small intestine and function to churn and fragment the digestive material are called:
(a) Segmentation
(b) Pendular movements
(c) Peristalsis
(d) Mass movements
(e) Mastication
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Textbook Question
A branch of the hepatic portal vein, hepatic artery proper, and branch of the bile duct form\(a) A liver lobule
(b) The sinusoids
(c) A portal triad
(d) The hepatic duct
(e) The pancreatic duct
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Textbook Question
Label the digestive system structures in the following figure.
a. ___
b. ___
c. ___
d. ___
e. ___
f. ___
g. ___
h. ___
i. ___
j. ___
k.___
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Textbook Question
Label the three segments of the small intestine in the following figure.
a. ___
b. ___
c. ___
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