BIOS 256 Week 7 lab practicum Chamberlain SUMMER 2025

Week 7 lab practicum




FERTILIZATION




MEMBRANE




IONA
PELLUCIDA :

Embryo Development—the First Week

Day 2 Day 3
4-cell stage 8-cell stage Day 4
2-celistage ~ =\~ Morula
Zygote Y\ @ laes) 7 Day 5
metaphase /, g \= J/ \( d )} { ) y
~\ \& ‘;i/ N— G0 Early
/7 — W8T/ 7, blastocyst
\ $%nasd)
= SH Days 6-7
Zygote— == o
egg nucleus and / \. < \‘o Blastocyst
sperm nucleus | ’) \"2a7¢. implantation
e/ els¥
\\%\) y{/ N — ™



Fertilization —— . 7
AW

Day 1
ZITIN
1 —
Secondary oocyte \
\_/

, @ Q wall of uterus




inner cell mass
(embryoblast)
trophoblast




blastocyst cavity
(blastocoele)




Embryo Development—the First Week

Day 2 Day 3
4-cell stage g-cell stage Day 4
2-c§II stage /\ ( y/ . Morula Dav &
Zygote /4 \ ' ay
metaphase e~ \*fi‘.“?/ \(xJ> C 9
— & W) ~— \ 490259 Early
[ A\ NJeRE 2w blastocyst
:‘. O J 'g‘:, o?’
‘
= / AT
Days 6-7
Zygote— ; ) /XL
eggnucleusand /% &) * Blastocyst
sperm nucleus ’ S2.27: implantation
7 ":?*ifi sy
N
\}
QY \ //
Fertilization j;_ .-S
7} .
Da 1 I
ay p
Secondary oocyte \
e/