1.the diaphragm. hope it helps
The muscular system is the organ system that is composed of tissue and can contract and relax.
Answer:
How Does It Work? Most birth control pills are "combination pills" containing a mix of the hormones estrogen and progesterone to prevent ovulation (the release of an egg during the monthly cycle). A woman cannot get pregnant if she doesn't ovulate because there is no egg to be fertilized. The answer is D.
amount of times you do something in a certain amount of time
