Author Question: Muscles that cause movement in opposite directions when they contract are called ________. (Read 91 times)



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Did you know?

In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.

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There are 20 feet of blood vessels in each square inch of human skin.

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Only 12 hours after an egg cell is fertilized by a sperm cell, the egg cell starts to divide. As it continues to divide, it moves along the fallopian tube toward the uterus at about 1 inch per day.

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The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.

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Adolescents often feel clumsy during puberty because during this time of development, their hands and feet grow faster than their arms and legs do. The body is therefore out of proportion. One out of five adolescents actually experiences growing pains during this period.

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