Human Reproduction Question 71
71. Identify the human developmental stage shown below as well as the related right place of its occurrence in a normal pregnant woman, and select the right option for the two together.
[2012M]
| Developmental stage |
Site of occurrence | |
|---|---|---|
| (a) | Late morula | Middle part of fallopian tube |
| (b) | Blastula | End part of fallopian tube |
| (c) | Blastocyst | Uterine wall |
| (d) | 8 celled morula | Starting point of fallopian tube |
Show Answer
Answer : c
Hints & Solutions
(c) Blastocyst is a thin-walled hollow structure in early embryonic development that contains a cluster of cells called the inner cell mass from which the embryo arises. The outer layer of cells gives rise to the placenta and other supporting tissues needed for fetal development within the uterus while the inner cell mass cells give rise to the tissues of the body. The blastocyst reaches the womb (uterus) around day 5 , and implants into the uterine wall on about day 6 .
