2nd-3rd week of Development

Question 1

T or F
The first trimester of pregnancy is the most critical

Answer 1

TRUE

Question 2

What week does this occur?
Bilaminar Germ Disc
o Focus is the embryoblast
o Bilaminar - embryoblast dividing into two layers

Answer 2

2nd Week of Development

Question 3

T or F
In the 8 th day of development the mother already knows shes pregnanat

Answer 3

FALSE
Day 8
o Not yet know that mother is pregnant

Question 4

Trophoblast Two Layers:

Answer 4

Cytotrophoblast
Syncitiotrophoblast

Question 5

Embryoblast Two Layers

Answer 5

Hypoblast Layer
Epiblast Layer

Question 6

• adjacent to amniotic cavity

Answer 6

Epiblast Layer

Question 7

adjacent to blastocyst
cavity

Answer 7

Hypoblast Layer

Question 8

outer, where cells
from cytotrophoblast migrate and fuse,
arrange and package

Answer 8

Syncitiotrophoblast

Question 9

inner, where mitotic
figures are found. Mitosis, this is where your
cells abruptly divide

Answer 9

Cytotrophoblast

Question 10

T or F
Epi means above; Hypo means below; Cavity
means space

Answer 10

TRUE

Question 11

What day does this occur?
Epiblast give rise to amnioblasts that line the
amniotic cavity - it will produce its lining

Answer 11

DAY 9

Question 12

What day does this occur?
Hypoblast cells will join with the exocoelomic
membrane to produce a lining surrounding the
primitive yolk sac

Answer 12

Day 9

Question 13

T or F
Primitive Yolk Sac or Exocoelomic Cavity or
Heuser’s Membrane was the Blastocyst Cavity

Answer 13

TRUE

Question 14

Day 10 is the

Answer 14

Day 10
● The rest day

Question 15

When?
● Chorionic Cavity or Extraembryonic Cavity develops from the Primitive Yolk Sac
● Embryo is completely embedded into the uterus

Answer 15

Day 11 and 12

Question 16

When?
Occurrence of bleeding at the implantation site as a result in increased blood flow into the lacunar
spaces

Answer 16

DAY 13

Question 17

T or F
Lacunar Spaces are found in the
syncitiotrophoblast

Answer 17

TRUe

Question 18

What produces cells that proliferate and form
new cavity within primary yolk sac known as
Secondary Yolk Sac

Answer 18

Hypoblast

Question 19

T or F
Connecting stalk becomes the pancreatic duct with
blood vessels

Answer 19

FALSE
Connecting stalk becomes the umbilical cord with
blood vessels

Question 20

the connection of mother and child occurs

Answer 20

Umbilical Chord

Question 21

When?
This is when menstruation starts. Spotting is
mistakenly as menstruation

Answer 21

DAY 13

Question 22

spots of blood, only little
amount and the next day it does not occur

Answer 22

Spotting

Question 23

95% occurs in Fallopian Tube instead of the
uterus

Answer 23

Ectopic Pregnancy

Question 24

Accounts to 9% of pregnancy related deaths due
to Internal Hemorrhage

Answer 24

Ectopic Pregnancy

Question 25

T or F Most ectopic pregnancies dies during the 7th month, and the mother suffers from heavy hemorrhaging

Answer 25

FALSE Most ectopic pregnancies dies during the second month, and the mother suffers from heavy hemorrhaging

Question 26

When is the Trilaminar Germ Disc present/ highlighted

Answer 26

3rd week of development

Question 27

The process that establishes all the three germ layers

Answer 27

Gastrulation

Question 28

From Hypoblast to germ layers - Ectoderm, Mesoderm, Endoderm

Answer 28

Gastrulation

Question 29

Derivatives

Answer 29

1. Endoderm - GIT, Lungs, and Liver 2. Mesoderm - Muscle, Connective Tissue, and Vascular System 3. Ectoderm - Entire Nervous System

Question 30

- cells migrating through the mid-streak level

Answer 30

Intermediate Mesoderm

Question 31

cells migrate through the caudal part of streak

Answer 31

Lateral Mesoderm

Question 32

first cells traveling to the cephalic end, the head

Answer 32

Prechordal Plate

Question 33

T or F The talusus develops into the legs of the baby

Answer 33

FALSE The caudal develops into the legs of the baby

Question 34

eventually becomes the mouth opening

Answer 34

Oropharyngeal Membrane

Question 35

- becomes the opening of the anus

Answer 35

Cloacal Membrane

Question 36

Solid cells extending from primitive node to notochordal plate

Answer 36

Notochord

Question 37

Any substance that could harm the embryo. In week three, the mother is not yet sure if she is pregnant

Answer 37

Teratogens

Question 38

The mother is prone to Teratogens if the mother is not living healthy

Answer 38

Teratogens

Question 39

Alcohol, caffeine, tobacco, drugs are examples of

Answer 39

Teratogens

Question 40

Insufficient caudal mesoderm has resulted in fusion of the – and birth defects

Answer 40

Caudal Dysgenesis or Sirenomelia

Question 41

The differentiation of cells in the Caudal part is not Completed

Answer 41

Caudal Dysgenesis or Sirenomelia

Question 42

Genetic defect that caused transposition of the viscera in the thorax and abdomen

Answer 42

Situs Inversus

Question 43

Occur when cells of the primitive streak get left behind in the sacrococcygeal region, and these cells develop into tumors attached to its but and feet

Answer 43

Sacrococcygeal Teratoma

Question 44

More common in female fetuses o The baby is not getting all the nutrients

Answer 44

Sacrococcygeal Teratoma