Embryonic Stage

What is the second stage of pregnancy called?

• The embryonic stage

• The fetal stage

• The zygote stage

• The neonatal stage

During which weeks of pregnancy is the developing baby called an embryo?

• 1st to 3rd week

• 3rd to 8th week

• 8th to 12th week

• 1st to 8th week

The embryo grows rapidly during the embryonic stage of pregnancy.

• True

• False

Fill in the blank: During the embryonic stage, cells begin to separate and develop into major systems of the human body such as the ______, lungs, bones, and muscles.

• heart

• kidney

• skin

• stomach

True or False: The internal organs and their systems are ready to function at the beginning of the embryonic stage.

• True

• False

Fill in the blank: The internal organs and their systems continue to ______ throughout the pregnancy.

• develop

• shrink

• disappear

• weaken

Approximately how many days after conception does the neural tube close in the developing baby?

• 10 days

• 27 days

• 40 days

• 60 days

Fill in the blank: At the point when the neural tube closes, the ______ begins to take control of the various body systems.

• brain

• heart

• lungs

• spinal cord

By about the 6th week after conception, what allows the first movements of the embryo?

• The heart starts beating

• The connections between the brain and the spine

• The lungs begin to function

• The bones are fully formed

The developing brain is sensitive to damage from any drugs or alcohol the mother might take, especially at this crucial stage.

• True

• False