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Hunter-Best [27]
4 years ago
14

What is the placenta, and what is its role in fetal circulation?

Biology
1 answer:
mote1985 [20]4 years ago
7 0

The prenatal circulation of blood is different than the postnatal circulation, mainly because the lungs are not in use. The fetus obtains oxygen and nutrients from the mother through the placenta and the umbilical cord. Blood from the placenta is carried to the fetus by the umbilical vein.

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Artesian springs bring pressurized groundwater to the surface through which feature of Karst topography?
AnnZ [28]

Answer:

The correct answer is D) Fissures

Explanation:

Karst is a topography or landform that is created by the dissolution of soluble rocks beneath the surface by waters from the surface or below.

Fissures are formed when because of earth movements there is the occurrence of a long, narrow opening, in the earth.

Artesian springs refer to the water coming out through these cracks or openings in the earth onto the surface of the Karst topography.

Cheers

4 0
3 years ago
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Answer:

Other cells.

Explanation:

All cells come from other cells as cells are "produced" when a cell divides into two.

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