Semilunar valves prevent backflow into the ; AV valves prevent backflow into the . Using your own observations, explain how the operation of the semilunar valves differs from that of the AV valve

The AV valves are involved during force generation of the ventricles; the semilunar valves are involved during cardiac relaxation

children tend to take more after their grandparents more than their parents. it’s the dna you received that was passed down to you somewhere in your family. maybe one of your grandparents had/has straight hair and you might have gotten it from them.

try using substitution:

x + y - 6 = x - y. (i'm not giving you the exact answer). since 0 = x - y, then sub 0 in the equation with x - y. combine your like terms, and then use inverse operations, and you'll have your answer.

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