Heart sounds are caused by A
contraction of the heart muscle
B
relaxation of the heart muscle
С
closing of the heart valves
D
movement of blood through the body

Many dentist offices prefer i appreciate cherries because the use of these trays or what

Which of these is most likely to prevent pregnancy? a. tracking of female body temperature to identify ovulation times b. proper condom use c. male withdrawal before ejaculation d. proper spermicide use

0% 10. use the table to answer the question. which elements would you expect to find mainly in the earth’s core? element density (g/cm3) aluminum 2.7 iron 7.87 nickel 8.9 silicon 2.33 iron and silicon aluminum and silicon aluminum and nickel iron and nickel