Where is the usual site of cervical dysplasia or cancer in situ?

Columnar epithelium of the cervix meets the squamous epithelium of the vagina.
That point where this epithelia meet is the transformation zone or the squamous-columnar junction and it's where the HPV can cause cancer more easily. First causes dysplasia and then advances to cancer.

exists as it is today

casts off matter as planetary nebula.

begins nuclear fusion at its core

enters red giant phase

becomes a white dwarf

becomes a black dwarf

Tiles

Explanation:

The solar system is formed over 4 billion years ago. It is formed from big cloud and gases called nebular.

The nebular collapsed and be one denser. The core of nebular becomes hot and undergo nuclear fusion reaction. nuclear reactions tends to expand it outwards. The gravitational collapse is balanced by the expansion due to fusion energy.

It will then expand and cool to become red giant. It will then shrink and heat up again to become white dwarf. These will slowly cool down for years.