Essentials of Human Anatomy & Physiology & Laboratory Manual  with Pearson eText -- ValuePack
Essentials of Human Anatomy & Physiology & Laboratory Manual with Pearson eText -- ValuePack
1st Edition
ISBN: 9780133877151
Author: Elaine N. Marieb
Publisher: PEARSON
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Chapter 14, Problem 2MC
Summary Introduction

Introduction:

The gastrointestinal tract (GI tract) is also known as the digestive tract. It is an organ system in which food is ingested and then digested in order to provide energy to the cells of the body. During this process, all the essential nutrients are absorbed and waste products are expelled or excreted out.

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From the esophagus to the anal canal, the walls of the digestive tract are made of the same four basic layers.  Arrange them in order from the lumen outward.     mucosa, submucosa, muscularis externa, serosa     mucosa, submucosa, serosa, muscularis externa     muscularis externa, serosa, mucosa, submucosa     serosa, mucosa, submucosa, muscularis externa
The esophagus differs from the rest of the gastrointestinal tract because it ... a) ... has smooth muscles in the upper part and striated muscles in the lower part. b) ... has villi and microvilli to increase the surface area. c) ... lacks mucosa. d) ... has striated muscles in the upper part and smooth muscles in the lower part. e) ... is not innervated.
Describe/define the five principal digestive juices (or fluids) that enter the digestive tract at various points.

Chapter 14 Solutions

Essentials of Human Anatomy & Physiology & Laboratory Manual with Pearson eText -- ValuePack

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