Joke of Today

英语自学网

Joke of Today
        　　    A lesson about blood flow and circulation
        　　    A teacher was giving a lesson on the circulation of the blood. Trying to make the matter clearer, he said: "Now, students, if I stood on my head the blood, as you know, would run into it, and I should turn red in the face."
        　　    "Yes, sir," the boys said.
        　　    "Then why is it that while I am standing upright in the ordinary position the blood doesn't run into my feet?"
        　　    A little fellow shouted, "'It's because your feet aren't empty."