Human Reproduction Question 71

[2012M]

alt text

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 .