Bones are made up of a framework of a protein called collagen , with a mineral called calcium phosphate that makes the framework hard and strong. Bones store calcium and release some into the bloodstream when it's needed by other parts of the body.
Answer is true
Answer:
a. dilation stage
Explanation:
Dilation stage -
The phase in the pregnancy ,
Cervix is present in the bottom portion of the uterus , this area opens when the women delivers a baby via vagina , is called the process of cervical dilation .
During the process of labor , the cervix opens up to release the head of the baby , which opens up to 10 centimeters , and the process is done automatically in most of the cases .
Толстой использует черно-белое.
