The Chorionic Villi

question 8

Multiple Choice

The chorionic villi

• A) form the umbilical cord.
• B) form the umbilical vein.
• C) form the umbilical arteries.
• D) increase the surface area available for exchange between the placenta and the maternal blood.
• E) form a portion of the placenta.

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Definitions:

Shortened

Made smaller in length, duration, or extent.

Metamorphic Grade

A classification of the degree of metamorphism or the extent of crystalline, structural, and chemical changes that have occurred in a rock due to heat, pressure, and chemical processes.

Banded Rocks

Rocks displaying layers or bands of varying composition and color, often a result of different historical geological processes.

Grassy Area

A region covered predominantly with grass, either in natural settings such as a prairie or as a designed part of landscapes.