The heart valves open and close passively because of pressure differences on either side of the valve. When pressure is greater behind the valve, the leaflets are blown open and the blood flows through the valve. However, when pressure is greater in front of the valve, the leaflets snap shut and blood flow is stopped.

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6 0

3 years ago

What statement about the dna replication process in prokaryotes is true

liubo4ka [24]

DNA replication occurs due to an enzyme. The DNA unzips, and the enzyme pieces together new parts to make each half its own full DNA strand.

7 0

3 years ago

Which description applies to hinge joints? o allows for a wide range of movement and rotation allows back-and-forth and side-to-

Rainbow [258]

Answer:allows for simple angular movement