The blood vessels of the umbilical cord are derived from which one of the following structures?
A) allantois
B) chorion
C) embryonic disk
D) amnion
E) yolk sac
Correct Answer:
Verified
Q10: Q11: The process by which the blastocyst becomes Q12: A zygote forms when Q13: The first four days of human embryonic Q14: When a sperm cell enters a secondary Q16: All of the following processes are associated Q17: During the development following fertilization, the morula Q18: Most sperm cells die in the vagina Q19: The placenta forms from embryonic tissue and Q20: In humans, fertilization usually occurs _ after
A) the nucleus from
A)
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