"WELCOME TO ROOM 21"

On March 16, Rm. 21 watched a dissection of a pig’s heart. This demonstration lesson was taught by Justin and Jessica, two of Mr. Madder’s students. The heart was on a tray. Justin used a scalpel to open the heart. We examined the shape and size of the heart. It was about the size of two fists put together. At the top we saw the aortas and veins. We saw a small layer of white fat. We saw the veins that feed the heart. We saw the four chambers of the heart. We saw the right and left auricles and ventricles. We saw that the heart muscles are about 2.5 cm thick. Justin cut open the aorta. We saw that it was whitish and smooth. The auricles were covered by a smooth surface. The ventricles had ridges that looked like strings. There were three big clots that remained in the heart. We saw tendons that run to the heart muscles. We learned that a pig’s heart is larger than a human’s. We learned that a blood clot could cause a heart attack. We learned about the circulation of blood through the heart. This was an exciting lesson. Some people felt a little sick!

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