LUNGS DISSECTION lab report.

Hey everyone. We do the lab with the 8^th graders. Enjoy!

Title: LUNGS dissection.

Purpose: to list and describe the principal structures of the mammalian LUNGS; to identify important parts of the LUNGS, to be able to explain LUNGS work.

Equipment: dissection pan, lungs, scalpel, scissors.

Background: The lungs are a pair of organs in the chest that are primarily responsible for the exchange of oxygen and carbon dioxide between the air we breathe and the blood. The tracheobronchial tree is the passage way from the mouth to the interior of the lung. Gas exchange occurs in the alveoli deep in the lungs. Breathing air in (inhalation) requires muscular effort.

Procedure:

1. Describe the look, feel and colour of the lungs.
2. Identify the trachea and explore the texture of its wall.
3. Explore the tubes that enter the lungs and see how they divide.
4. If the heart is still attached, identify the main blood vessels leaving and entering the lungs. If not, try to identify large blood vessels anyway.
5. Identify any membrane surrounding the lungs.
6. Inflate the lungs (following your teacher’s instructions) and observe how they behave.
7. Cut a piece of lung tissue and observe the cut surface and how the tissue behaves when you drop it into water.

Result: We carried out all the stages of the lab work correctly.

While conducting part A …

In part B …

Conclusion:

1. What structure makes the windpipe(trachea) stay open, but able to bend?
2. Are the lungs hollow bags or spongy? What does the lung tissue look like where you cut into it? What happens when you put this tissue into water?
3. What are the lungs like when full of air? Do you have to squeeze them to push the air out again?
4. In a living organism, what body movements draw air into the lungs? 
5. In a living organism, what body movements force air from the lungs?

In part A … I think it was … It is also possible that the lungs …

In part B … I think it was the result of … Point proven.