Date: Sat Oct 4 00:03:11 EDT 1997
Subject: A.Word.A.Day--imperforate adj. 1. Not perforated; having no opening. 2. Not perforated
into perforated rows. Used of stamps and sheets of stamps.-n. An
imperforate stamp.

In histology we learned that some important tubular structures are formed by two tubes with ends closed
come together at the blind ends. Much later the barrier
so formed is obliterated. But not always. Some infants
are born with imperforate anus, and some with imperforate