Straighterline BIO202L Lab 16 The Digestive System Completed Worksheet with all lab photos
(Latest Version August 2024)
Lab Report Format Expectations
Utilize college level grammar and professional formatting when completing this worksheet.
Submissions without proper formatting, all required photos or sufficient responses will be rejected. Pre-
lab Questions
1. Explain the digestion that occurs in the oral cavity.
Digestive processes in the mouth combine chemical and mechanical processes. Food is broken
down into smaller pieces during chewing, which is the mechanical digestion process. Saliva,
secreted by salivary glands, contains enzymes such as salivary amylase that start the breakdown
of carbohydrates and moisturise and lubricate food.
2. What is the function of the liver in digestion?
The liver is essential to digestion. In addition to synthesizing plasma proteins, it detoxifies,
metabolizes, stores, and distributes nutrients as needed. Bile is produced to help emulsify fats.
These processes aid in digestion and sustain the body's metabolic balance.
3. What role does the gall bladder play in digestion?
Bile, stored and released by the gallbladder, is essential for the small intestine's emulsification
and breakdown of fats. Large fat globules are broken down into tiny droplets by bile containing
bile salts, increasing the surface area available for lipase enzymes to effectively break down
lipids. This procedure guarantees that the body effectively uses dietary fats and is necessary for
digesting nutrients.
4. Why is the orientation of muscle of the stomach wall important? How does this contribute to its
function?
All of these orientations are necessary for the stomach to effectively break down food, which
involves agitating and compressing the material. The muscle tissues comprising the stomach
wall tend to move along diagonal, circular, and long axes, although they can move in any
direction. Chyme is produced when the food particles are further broken down by hydrochloric
acid.
,Lab 16 The Digestive System BIO202L
EXPERIMENT 1: MICROSCOPIC ANATOMY OF THE DIGESTIVE SYSTEM
Introduction Questions
1. Label the items in the following slide pictures.
A. lamina
B. epithelia
C. submucosa
D. mucosa gland
E. submucosa
, Lab 16 The Digestive System BIO202L
Data and Observations
Draw the digital slide of the esophagus. Insert your drawing here. Remember that your drawing should
have your name and access code handwritten in the background.
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