Three Questions! (December 14)

SA node

1. Lately I have turned in my Frankenstein Essay and almost finished reading The Picture of Dorian Gray in English. In Anatomy, we started the Cardiovascular System and got all of our packets.
2. I've learned that a baby's heart starts beating alone, without the help of an electrical impulse! Pretty crazy stuff!  This is due to a piece of tissue, called the SA node, that regulates the pace of the heart, the pacemaker. When someone's heart beats irregularly, a pacemaker is inserted that takes the place of the SA node.
3. Next week I play on studying like crazy for my finals in every class. What a joy! And on top of all of that, I just got sick. High school is flying by, but I'm looking forward to a break from this semester .

SA node image from http://drugline.org/img/term/sa-node-13124_3.jpg