A teacher was giving a lesson on the circulation of blood.
Trying to make the matter clearer, he said, "Now class, 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 class said.
"Then why is it that while I am standing upright in an ordinary position the blood doesn't run into my feet?"
Pappu shouted, "Cause your feet ain't empty."
Trying to make the matter clearer, he said, "Now class, 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 class said.
"Then why is it that while I am standing upright in an ordinary position the blood doesn't run into my feet?"
Pappu shouted, "Cause your feet ain't empty."
