Answer:
my answer is 12-17 years old
Normally, two distinct sounds<span> are </span>heard<span> through the stethoscope: a low, slightly prolonged “lub” (first </span>sound<span>) occurring at the beginning of ventricular contraction, or systole, and produced by closure of the mitral and tricuspid valves, and a sharper, higher-pitched “dup” (second </span>sound<span>), </span>
Answer:
i would say the first option
Explanation: hope this helps :)
The answer is false. A fertilized egg matures into a baby (embryo) within the uterus. But the egg starts off in the fallopian tubes which connects the ovaries to the uterus. The newly fertilized egg is called a zygote which travels through the fallopian tubes into the uterus where it attaches to the wall of the uterus and then continues the development.
Answer:
I would love to help but you forgot to out the choices!