Which of the following is the most important event during the third week of development?
A) heart becomes four-chambered
B) gastrulation
C) blood cells form in liver
D) limb bud development
Correct Answer:
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Q3: On the diagram, 2 is pointing to
Q4: Dizygotic (fraternal) twins result from
A) fertilization of
Q5: Which structure contains enzymes used to penetrate
Q6: The structure(s) responsible for delivering oxygenated blood
Q7: The most common site for ectopic pregnancies
Q9: The period of development called the embryonic
Q10: The placenta allows which of the following
Q11: Cleavage
A) is completed in the first two
Q12: Which of the following structures actually implants
Q13: The three primary germ layers develop from
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