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.
● What is the purpose of this exercise?
Are there any safety concerns associated with this exercise? If so, list what they are and what precautions should be taken.
Exercise 1: The Microscopic Structure of Cutaneous Membranes
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.
A. What is keratin?
A specialized protein that provides the protective barrier the skin needs.
B. Why is the skin keratinized?
The keratinized skin protects the body from 70% of all infectious bacteria and viruses it touches.
Exercise 2: The Microscopic Structure of Mucous
Draw and describe the structures you observed of the following slides: A. Pseudostratified ciliated columnar epithelium of the trachea
B. Stratified squamous epithelium (non-keratinized) of the esophagus
C. Simple columnar epithelium (duodenum) of the small intestine
A. Compare and contrast the roles of the three mucous membranes.
Mucous membranes are composed of epithelial cells lying on top of loose connective tissues. Serous membranes are epithelial cells that are attached to a small amount of aerolar connective tissues. These membranes are unique because they occur in two layers. Synovial membranes are composed entirely of connective tissue and are found lining the cavities around the joints. These membranes help provide a smooth surface for the movement of joints.
B. What is the role of mucous in the body?
To essentially protect our bodies from invasions.
Exercise 3: Observing Synovial Membrane
| | |Data Table 1: Observing Synovial Membrane | | |Tissue Types (epithelial/ | | | |Membrane |connective) |Common Location |Functions | |Cutaneous | Epithelial, connective | Skin | Secretion of oil & sweat | | | Epithelial, connective | Lining of digestive, respiratory & | Secretion of mucus, absorption | | | |urogenital tracts | | |Mucous | | | | | | Epithelial, connective | Lining of close ventral body cavities | Secretion of serous fluid, | |Serous | |...
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