PRE LAB1. What is the esophagus and what is its function?
2. How does its structure relate to its function? What type of tissue is the esophagus made up of and what would a cross section appear like under a microscope? 3. What is the sphincter at the end of the esophagus called and what is it made of? 4. What has occurred when one gets heartburn? What causes this? 5. How do you think swallowing is affected when upside down or lying down? |
POST LAB1. Does the rate of movement of water in the esophagus vary between the three positions? If so, how?
2. What do your data suggest about the role of gravity in transporting materials from your mouth to your stomach? 3. Explain the role of muscle tissue in this activity. |