Which of the following structures is not found in a living pulp?

When horse serum is injected intravenoulsy in to a rabbit and again in to the skin two or three weeks later, what is the necrotizing reaction that occurs as the site of the second injection________?

Which of the following is not correct?

In which of the following areas is the alveolar process the thinnest________?

Radiographs of a 40 years old female revealed radiolucent areas around several of her mandibular teeth, all which tested vital on the electric pulp tester, These area represent?

Which statement is correct about decidous dentition?