Mixing chemicals with waste in sewage holding tanks or septic. systems may produce toxic fumes, corrode pipelines and tanks, and. pollute soil and ground water when discharged. When chemicals, such as formaldehyde, are added to septic systems, they can cause. bacteria in the system to die.
The cervix is the opening to the womb. Itâs located between the vagina and the uterus and plays a crucial role in pregnancy and labor. During pregnancy, it remains closed and the opening is blocked with a mucus plug.
The cervix produces cervical mucus that changes in consistency during the menstrual cycle to prevent or promote pregnancy. During childbirth, the cervix dilates widely to allow the baby to pass through. During menstruation, the cervix opens a small amount to permit passage of menstrual flow.