Muscle

The myometrial layer of the uterus may be the strongest muscle by weight in the female human body. Each fiber can exert a force on the order of 0. Myosin proteins act like oars on a boat, pulling the thin filaments closer to the center of a sarcomere. In the other line of thought, scientists believe muscles cells evolved more than once and any morphological or structural similarities are due to convergent evolution and genes that predate the evolution of muscle and even the mesoderm - the germ layer from which many scientists believe true muscle cells derive.

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