Plz help me on this question and nooo links pls true or false
The first heart sound (S1) is caused by closure of the AV valves and the second heart sound (S2) is caused by closure of the SL valves.

TRUE❤#Correct me if I'm wrong#HopeItsHelp

Hey your answer should b c

If it's a smaller child or infant, place one on the middle of the chest and on the child's back. (if it is a bigger child with enough room for two, place one on the upper right/your left of the chest, and one on the lower left/your right) the pads should never touch each other.