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 yer feet ain\'t empty.\"
\"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 yer feet ain\'t empty.\"
