Early human development

Question 1

What name changes does the fertilized zygote get in the first 2 weeks of the pre-embryonic period?

Answer 1

it goes from zygote, to Morula (for about 72 hours) and Blastocyst (for about 5 days)

Question 2

after implantation the inner cell mass forms a 2-layer (bilayered) embryonic disc composed of _____ and ______

Answer 2

Epibast and Hypoblast

Question 3

epiblast will go under mitosis to form what??

Answer 3

amnion- with a fluid filled amniotic cavity

3 germ layers of the embryo

Question 4

the hypoblast will undergo mitosis to for what?

Answer 4

yolk sac

Question 5

________ will form nervous system and the epidermis of the skin

Answer 5

ectoderm

Question 6

________ will form muscles, cardiovascular system, dermis and most bones

Answer 6

mesoderm

Question 7

___________ will form epithelial linings of the digestive, respiratory, urinary, reproductive systems and their associated glands

Answer 7

endoderm

Question 8

does the heart begin to beat durring the embryonic period?

Answer 8

yes

Question 9

major organ systems are almost completly formed durring which period?

Answer 9

embryonic period

Question 10

the Chorion, Amnion, Yolk sac and allantois are all formed durring the pre-embryonic period… true or false

Answer 10

false…its the embryonic period