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Details

Embyro
1st Test
36
Anatomy
Graduate
01/30/2010

Additional Anatomy Flashcards

 


 

Cards

Term
4 requirements for fertilization to occur?
Definition

Viability - viable gametes

 

Location - gametes must meet

 

Capacitation of sperm

 

Acrosome reaction

Term
where does the sperm penetrate?
Definition
zona pellucida
Term
a zygote contains how many chromosomes?
Definition
46
Term
zygote is formed how?
Definition
from the fusion of pronuclei
Term
cleavage is initiated by what?
Definition
formation of the zygote
Term
blastomeres are produced by what?
Definition
cleavage of an oocyte
Term
morula is made up of ?
Definition
16 - 32 blastomeres
Term
morula is formed when?
Definition
3 days after fertilization
Term

inner & outer cell mass

form what & contain

what type of cells?

Definition

inner = forms embryo - embryoblast

outer = forms trophoblast

Term
blastocyst forms when?
Definition

4 days after fertilization

 

(still preimplantation)

Term
what day does implantation begin?
Definition
6
Term

when and where does the 

zona pellucida disintegrate?

Definition

in the blastocyst

around 4 to 5 days before implantation

Term
embryoblast forms what 2 germ layers?
Definition

epiblast

 

hypoblast

Term
trophoblast forms what 2 tissues
Definition

synciotrophoblast

 

cytotrophoblast

Term
blastocyst cavity forms into what 2 cavities?
Definition

amniotic cavity

 

chorionic cavity

Term
placenta previa
Definition

abnormal implantation within the uterus

 

mother/child will bleed out

Term
ectopic pregnancy
Definition

implantation outside the uterus

 

ex = tubal pregnancy

rectouterine cavity (Douglas' pouch)

Term

What is abnormal about a

Hydatidiform mole?

 

this produces high levels of what hormone?

Definition

contains only trophoblasts

no embryonic tissue = no baby

 

hCG (human chorionic gonadotropin)

Term
what hormone is used in pregnancy tests?
Definition
hCG
Term
epiblast is made of what kind of cells?
Definition
columnar
Term
hypoblasts contain what type of cells?
Definition
cuboidal
Term
amnioblasts are found where?
Definition
in the amniotic cavity within the epiblast
Term

what day does the embryoblast become a

bilaminar germ disc

Definition
day 8
Term

on what day does

uteroplacental circulation occur?

Definition
11 or 12
Term
vacuoles are filled with what?
Definition
maternal blood
Term

who is responsible for making

blood barriers?

Definition
fetus
Term

what 2 layers surround the

extraembryonic coelom (chorionic cavity)

Definition

somatopleuric mesoderm

 

splanchnopleuric mesoderm

Term

somatopleuric mesoderm

lines and covers what?

Definition

lines trophoblast

 

covers amnion

Term

splanchnopleuric mesoderm 

is around what?

Definition
yolk sac
Term

extraembryonic mesoderm

appears on what day?

Definition
12
Term

extraembryonic mesoderm 

forms between what?

Definition

cytotrophoblast

germ disc

plus amnion and yolk sac

Term

primary chorionic villi

contain what cells?

 

what day?

Definition

trophoblast only

 

day 13

Term

secondary chorionic villi

is the core of what?

 

day?

Definition

core of mesoderm

 

day 16

Term

tertiary chorionic villi 

contain what?

 

which week?

Definition

blood vessels

 

3rd week

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