The heart is strengthend through cardiovascular exercise.
Answer:
Diaphragms
C. Create a physical and chemical barrier to sperm.
Cardiovascular
sorry I only have 1, I couldn't think of another one. I hope this helps and you find the other one.
I believe this is true, abstinence is the act of not continuing to have sex so if a person DOES NOT practice abstinence, then that person could get STD or if it is a female, she could get pregnant. Hope this helps:)
It has greatly effected the life expectancy by introducing new machines used to cure/ research diseases.
