that was very interesting,i just think ,i am 77 years old,and that’s a lot of heart beats,so far the doctor checks me out every three months and listens to my heart and so far she said sounds good.you are a very good teacher and i like the way you presented this one on the heart .your voice is nice to listen to and of course your pretty to watch.i have watched your other video’s also, the one of you out in the cold ,that is the way i use to dress up in new york state, the winter months were sometimes 5 below 0,YOU LOOK GOOD IN THAT OUTFIT.
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