[slideshare id=61756&doc=blood-quiz1015&w=425]

[slideshare id=61741&doc=04bloodvessels942&w=425]

Your homework is also included in this slideshow – due monday

Who can give blood? 

[slideshare id=61702&doc=05-the-heart127&w=425]

We looked at some cool optical illusions today. See if you can see the picture below – try letting your eyes go in and out of focus.