Hi, I hope you all enjoyed the heart dissection yesterday and, if enjoyed isn't quite the right word, I hope it was useful and interesting!
The timetable suggests finishing off the circulatory system this week and then moving on to the last topic, the lymphatic system next week. I shall post this last unit at the end of the this week.
In response to our discussion at the block course, I have been looking up information on the foramen ovale which is the opening in the foetal heart between the right and left atrium that allows the blood to bypass the lungs. The best description I could find was on Wikipedia at this site http://en.wikipedia.org/wiki/Fetus . Scroll down to the section on Circulation where the foetal heart is described and then under Postnatal development it describes how the opening closes as soon as the new born takes its first breathe.
For those that were asking for more worksheets, there are three useful ones on the heart, blood and circulation on the Wikieducator Anatomy and Physiology of Animals site http://www.wikieducator.org/The_Anatomy_and_Physiology_of_Animals
Just remember that in animals the human superior and inferior vena cavae are the cranial and caudal vena cavae. Also the heart valves in animals tend to be called atrio-ventricular valves rather than bi-and tricuspid valves.
All the best, Ruth
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