A deficiency of <span>thiamine causes beriberi. If you need more help use this link </span>http://www.flashcardmachine.com/nursing-nutrition-chapter78.html
The nervous system is what i'd say. Are there any options?
Answer:
Labor contractions are the periodic tightening and relaxing of the uterine muscle, the largest muscle in a woman's body. Something triggers the pituitary gland to release a hormone called oxytocin that stimulates the uterine tightening.
I hope it's helpful!
