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.
I think that the answer is D!
Most likely caused by her eating disorder/anorexia
Wear gloves and hairnets. Regularly disinfect any surfaces that you’ll use
I believe the answer is A. 68
Hope this helped !!
