Answer is bottom front teeth
Reason
Firstly, this area is a difficult spot to clean, especially if the head of your toothbrush is bulky. It is very easy to skim over, leaving plaque behind. Also, there are saliva ducts present on the floor of the mouth, adjacent to these teeth, so saliva is continually bathing this area.
I believe it means to split him open from his navel to his jawbone.
Answer: Meninges
Explanation: Meninges are membranes that cover and protect the brain and spinal cord. There are three layers of meninges: Dura mater (closest to the bone), Arachnoid loosely around the brain, Pia mater is closely attached to the brain and spinal cord surface. Cerebrospinal Fluid (CSF) cushions the brain and spinal cord.
First is contractions get stronger, then the baby is born, then umbilical cord is cut and lastly the placenta is pushed out.