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'''What Carnegie stages occur during week 3 and week 4?''' | '''What Carnegie stages occur during week 3 and week 4?''' | ||
Stages 7 to 9 in week 3 where 3 major importance was given to gastulation,placentation and notochord formation | Stages 7 to 9 in week 3 where 3 major importance was given to gastulation,placentation and notochord formation | ||
Revision as of 11:51, 18 August 2010
--Navneet Ahuja 23:38, 28 July 2010 (UTC)
External link SMH
Picture
--Navneet Ahuja 23:15, 4 August 2010 (UTC)
Lab 2 Questions
What factor do the synctiotrophoblast cells secrete to support the ongoing pregnancy?
a> Synctiotropoblast secrete hormone hCG - Human chorionic gonadotropin that support the pregnancy
What does the corpus luteum secrete to prevent continuation of the menstrual cycle?
b> Corpus luteum produces hormone Estrogen and Progesterone that prevents mentruation
--Navneet Ahuja 23:04, 11 August 2010 (UTC)
Questions for lab 3 :
What Carnegie stages occur during week 3 and week 4?
Stages 7 to 9 in week 3 where 3 major importance was given to gastulation,placentation and notochord formation
stages 10 to 13 in week 4 where organogenisis occurs and major organ such as heart are formed.
From week 3 to week 4 = 7-13 carnegie stages
What is the change in overall embryo size form the beginning of week 3 to the end of week 4? At week 3 embryo is 0.4 mm in size measure by CRL and by the end of week 4 (carnegie stage 13) the embryo became 3-5 mm and hence the growth is between 2.6-4.6 mm
Approximately when do the cranial (anterior) and caudal (posterior) neuropores close in the human embryo? The cranial neropore closes at Carnegie stage 11 (about 24 days) within a few hours.
The caudal neropore closes later than cranial neropore since it closes at Carnegie stage 12 (about 26 days) over a day.
