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amid [387]
2 years ago
8

Which test is performed after 18 weeks of pregnancy by collecting a small amount of blood from the umbilical cord for testing

Medicine
1 answer:
lisabon 2012 [21]2 years ago
6 0
Percutaneous umbilical blood sampling (PUBS): Also known as cordocentesis, its fetal blood sampling, or umbilical vein sampling, this quick test examines fetal blood directly from the umbilical cord to detect disorders in the fetus. It's usually done after 18 weeks of pregnancy.
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Answer:

Taking into account that:

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u = u (x, t)

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q = || u ||

Now if the flow is continuous as it happens in the blood vessels then:

The flow of a fluid is said to be constant if it does not move over time, that is why the variant would be 0.

Explanation:

As for the pump with narrow vessels, there the area would be less, therefore the flow also and the flow velocity as well. Adding that the friction with the walls increases as it is narrower, thus generating an increase in pressure with the flow of the liquid.

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The Venturi effect is explained by the Bernoulli Principle and the principle of continuity of mass. If the flow rate of a fluid is constant but the section decreases, the speed necessarily increases after crossing this section. By the theorem of conservation of mechanical energy, if the kinetic energy increases, the energy determined by the value of pressure necessarily decreases.

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4 years ago
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Answer:

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