The Early Development of Vertebrates; Mammals Flashcards
oviduct is aka the
fallopian tube
cleavage is the division of
blastomeres
the division of blastomeres through rapid mitotic division is known as
cytokinesis
when does cleavage begin?
18-24 hours after fertilization in the oviduct
rotational cleavage is the
division in 2 planes
- meridian
- equatorial
blastomeres do NOT divide in _________
this results in…
synchrony
odd numbers of cells
what is driving/controlling the cleavage process?
genetic control of the diploid nucleus of the zygote
abnormalities in the genome results in
cessation of mitosis & embryo development
leads to termination of pregnancy
cadherins are
adhesion proteins
compaction is the
tight bonding of blastomeres through cadherins
compaction forms a
compact ball of cells
what stabilizes the outer ring of cells in compaction?
tight junctions
cell communication in compaction is established through
gap junctions
define morula
solid ball of blastomeres forming @ 3 days post fertilization
when does the human embryo exit the oviduct and enter the uterine space?
between the morula and blastocyst stage