vas/o can be used to mean many types of vessels, ducts, or tubes. Look at the words used in your dictionary beginning with vas or vas/o. They could be confused with angi/o. The four words in Frame...

vas/o can be used to mean many types of vessels, ducts, or tubes. Look at the words used in your dictionary beginning with vas or vas/o. They could be confused with angi/o. The four words in Frame 6.131 refer to the vas deferens only—no other vessel. The vas deferens is shown in the illustration of vasectomy.