Answer:
B) Valves closing
Explanation:
A healthy heart makes a lub-dub sound with each beat. This sound comes from the valves shutting on the blood inside the heart. The first sound (the lub) happens when the mitral and tricuspid valves close.
Answer:
Explanation:
Ebullism and lack of oxygen would inevitably kill you, so without a suit, a person could survive for about 3 minutes.
Answer: Technology has changed her life now if you need to be somewhere you have GPS we are cars that drive by itself we have all type of different apps on phones so now kids stay on the phone forever
Explanation:
I will try to help you with your work just tell me what you need help with and i will try to help
