Classification of Body Membranes

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Classification of Body Membranes
Laszlo Vass, Ed.D. Version 42-0010-00-01

Lab Report Assistant
This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions, diagrams if needed, and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports by providing this information in an editable file which can be sent to an instructor.

Purpose

● What is the purpose of this exercise? The purpose of this exercise is to be able to classify the body membranes.

Are there any safety concerns associated with this exercise? If so, list what they are and what precautions should be taken. Safety concerns involve the precautions of handling the microscope.

Exercise 1: The Microscopic Structure of Cutaneous
Membranes
Observations
Sketch your observations from the microscope slide in the lab report assistant. Indicate the keratinized layer on the sketch and describe the observed structures and cells.

Questions
A. What is keratin? Keratin is tough fibrous protein that gives the epidermis its protective properties.

B. Why is the skin keratinized? The skin is keratinized because the skin is exposed to the outer environment.

Exercise 2: The Microscopic Structure of Mucous
Membranes
Observations

Draw and describe the structures you observed of the following slides: A. Pseudostratified ciliated columnar epithelium of the trachea: The presence of cilia, and goblet cells appear in the trachea.

B. Stratified squamous epithelium (non-keratinized) of the esophagus. The...
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