Thursday, October 20, 2011

Chicken Wing Anatomy Lab (chicken wing dissection)

The purpose of this lab was to identify the different types of tissues and organs found in this structure.
             First, the skin had to be taken off the wing, and the wing of course is an epithelial tissue. The skin was a yellow color and a little bumpy. After getting the skin off, the muscle was shown. the muscle was a peachy-pink color. The muscle was attached to the bone, and the nerve was also located in the muscle, which looked like a red line. After observing that the muscles and nerve helps move the wing, the muscle tissue is taken out as well. That's when bones are shown and able to see the ligaments and cartilage, which are both white and shiny. The cartilage is attached to the ligament which helps attach the joints to the bone. 
             After observing all of this, I am able to see that the muscle tissue is the most tissue that helps the wing the most to contract and relax. 

Tuesday, October 11, 2011

Diffusion Lab- Classroom Response

         In the Diffusion Lab, we learned that Iodine is an indicator for starch, and that an indicator is a substance that changes color in the presence of the substance it indicates. After our group did the procedure, our observation was that the substance of the starch and water was supposed to change color because the iodine came into contact with the starch and the water; this is called "diluted". Sadly, the starch did not change color. We believe it's because of the material of the plastic-zip-lock bag we were using. But then again, as long as we were able to learn from our mistakes, it's fine; especially because even scientists make mistakes and end up finding something else that works for it.