Be sure to skim through the entire lab procedures before starting. Make sure you know what is expected of you before you start.
Summarize the general steps that you are going to follow for the lab today.
Please list the names of members of your lab group. You are each still responsible for submitting your own work.
1. To prepare the cat for observation by opening the ventral body cavity.
2. To identify and name the major endocrine organs on a dissected cat.
You can write your own.
Write a hypothesis that might predict/explain a comparison between the human endocrine system and the cat endocrine system.
Dissecting Tray and instruments
Cat Dissection Hand-out
You can find your own for this lab.
See Cat Dissection handout for additional information.
This lab should be completed in less than one day. Make sure that you read ALL the information in the packet, not just the steps to the activities.
1. Do Activity: Opening the Ventral Body Cavity on page 755 of the Cat Dissection Han-Out.
2. Do Activity: Identifying Organs on pages 755-756 of the Cat Dissection Hand-Out.
3. Do Activity: Preparing the Dissection Animal for Storage on page 758 of the Cat Dissection Hand-Out. An additional step here is to continue to wrap the cat back in its skin.
4. Answer the questions from the Dissection Review on page 758 of the Cat Dissection Hand-Out in the Analysis Section below.
Attach your drawings to this section.
Answer any questions in this section.
Include the answers to these questions in your Discussion:
These should be your own answers, not shared with your lab partner
1. How do the locations of the endocrine organs in the cat compare with those in the human?
2. Name two endocrine organs located in the throat region.
3. Name three endocrine organs located in the abdominal cavity.
4. Given the assumption (not necessarily true) that human beings have more stress than cats, which endocrine organs would you expect to be relatively larger in humans?
5. Cats are smaller than humans. Which would you expect to have a (relatively speaking) more active thyroid gland - cats or humans? Why?
Write a thoughtful conclusion to your lab investigation. This should include a restatement of the problem, hypothesis, and a quick summary of the procedure. Then you should discuss whether your hypothesis was supported or not supported. Or, if there was no hypothesis, relate the conclusion back to the proplem or purpose of the lab. Support your conclusions with evidence and reasoning from your observations. In other words, use YOUR data and observations to determine whether the hypothesis was supported or not supported.
The conclusion is your chance to discuss the results from the lab. What were the results? Why are the results significant? How do you know what you know? What conclusions can be drawn from the experiment? How does your data support your conclusion? What can you say about what happened in the lab? Use the five habits of mind as you write your conclusion. This is your chance to summarize the results of the lab IN YOUR OWN WORDS, and discuss any implications of your results. (In other words, what actually happened in the lab...and did you accomplish the purpose of the lab?) You should also discuss any possible sources of error in your conclusion. This is the most important section of your lab report. Your conclusion is more than just answering the questions!
A helpful hint is to think of your conclusion as a "stand alone" document that can be read by somebody who didn't conduct the lab. The conclusion should give them enough information to have a general idea of what was done, the results, and the significance of those results. Think of it as an "Executive Summary."
The biggest mistake people make with their conclusion is to start with: In this lab, I learned...
The following words should NOT be used in a conclusion: