There are more than one body systems at work to ensure that oxygen is sent to the cells in your body. which body systems interact to make this happen? a. respiratory system and excretory system b. respiratory system and immune system c. circulatory system and respiratory system d. circulatory system and digestive system

the answer is it ussually drops give brainliest

if your boyfriend is cheating on you, my best advice to you is to dump him, he's only going to drag you down. and if you do, don't fret there's plenty better that know how to treat a person right. i mean honestly, the whole point of a romantic relationship is love, and if you love someone you aren't going to cheat on them. i do believe in second chances, but why would he cheat in the first place? i personally feel that if someone cheats, they ruin any chance they wanted/had with you. i wish you the best of luck with this, hang in there.