Oxytocin.
This process is called contraction. Muscles shorten or contract to produce movement.
Smooth muscles
When an egg is not fertilized by sperm, this causes the breakdown of the uterus lining. It is known as menstruation.
Smooth muscles and cardiac muscles are found in the heart.
Laryngospasm
Oxitosin is the hormone. It is secreted by pituitary.
They also cause the muscles of the uterus to contract, thus helping the uterus shed the lining built up during the first part of a woman's cycle.
Meat
The muscles contract which in turn push the baby out.
Girls' bodies produce a chemical that make the muscles of the uterus contract.
Medicinal cannabis causes the muscular system in the human body to contract or relax. Try it :)
Oxytocin causes the uterus to contract. Oxytocin is released by the posterior pituitary gland.
it is a problem in the nervous system
beta blockers
Uterus starts to contract causing the amniotic fluid to break out
The intercostal muscles, (muscles between the ribs), contract.
auto-rhythmic cardiac muscle