On December 13 and 14, 2011, multiple frogs were dissected during science class. They were dissected in order to show students how the systems of your body work together. The class did not struggle while dissecting the frogs because they already had some experience with dissecting. Earlier in the school year, the class had to dissect earthworms. 
The hardest part about the dissection was probably locating each and every organ in the frog. Most of the organs had the same name as the organs in our body (heart, lungs, liver, etc.), so that helped students identify the function of the organs. Another difficult task was opening the frog. This needed lots of concentration because there was a chance that some organs may be cut during the process. The frog had two layers. First, the skin. Second, the muscle. Cutting the muscle layer was quite difficult because in order to open the frog properly, students had to cut through bone. Some students felt disturbed when they heard the bone crunch as the scissors broke through it.
The hardest part about the dissection was probably locating each and every organ in the frog. Most of the organs had the same name as the organs in our body (heart, lungs, liver, etc.), so that helped students identify the function of the organs. Another difficult task was opening the frog. This needed lots of concentration because there was a chance that some organs may be cut during the process. The frog had two layers. First, the skin. Second, the muscle. Cutting the muscle layer was quite difficult because in order to open the frog properly, students had to cut through bone. Some students felt disturbed when they heard the bone crunch as the scissors broke through it.
When the frog was finally opened, the class started to observe several organs inside. The first organ that they saw was either the liver or the large amount of eggs (depending on the gender of the frog). In order the complete the dissection lab, students had to tediously remove all of the eggs from the frog.
The liver is the largest organ in both the frog and human body. Its job is to produce bile, a substance which helps break down fat molecules in food. The next organ that the students saw was most probably the stomach. The frog's mouth does not have anything to do with digestion because frogs swallow their prey whole. That means that the stomach is the first major site of chemical and mechanical digestion in the frog. Some organs were difficult to see because of their location. For example, the gall bladder is located under the liver. Since the liver covers most of the frog's interior, the only way to see the gall bladder is to lift up the lobes of liver. This lab was quite interesting and it has gotten some students thinking about becoming doctors in the future.
No comments:
Post a Comment