The Early Conceptus Can Spontaneously Abort If It Doesn't Implant

question 2

Multiple Choice

The early conceptus can spontaneously abort if it doesn't implant into the uterine wall and develop a uteroplacental circulation.Which vessels of the embryo directly contribute to this essential circulation?

• A) Dorsal aortae
• B) Precardinal veins
• C) Vitelline arteries and veins
• D) Allantoic arteries and veins
• E) Postcardinal veins

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Definitions:

Wavelength

The distance between successive crests of a wave, especially points in a sound wave or electromagnetic wave.

Sense of Color

is the capacity to perceive and distinguish between different colors, including their hues, saturation, and brightness, primarily mediated by the cone cells in the human eye.

Iris

The colored part of the eye that controls the size of the pupil and the amount of light that enters the eye.

Refraction

The bending of light as it passes from one medium to another with a different density, affecting its speed and direction.