Answer:
First stage: This starts with contractions and your cervix dilating and ends when your cervix is fully open. ...
Second stage: This is when you push your baby through the birth canal.
Third stage: This ends with the delivery of the placenta, also called afterbirth.
Explanation:
<span>What is the name for the tiny air sacs of the lungs?
<span>the pulmonary alveoli</span></span>
