W12 Embryology

Question 1

what are the steps of ovulation

Answer 1

growing follicles will break open
release oocytes into the ampulla
then travel to the uterine tube

Question 2

what space does the sperm need to penetrate

Answer 2

perivitelline space

Question 3

what is the nucleus called when the egg is fertilised

Answer 3

pronucleus

Question 4

what do cells grow to after 1 mitosis

Answer 4

morula

Question 5

what is the outside of the blastocyst called

Answer 5

trophoblast

Question 6

what is the job of the embryoblast

Answer 6

development of the fetus

Question 7

how long does it take to form the blastocyst

Answer 7

1 week

Question 8

what is formed after 2 weeks of pregnancy

Answer 8

the bilaminar disc

Question 9

what is Gastrulation

Answer 9

formation of a multi-layered embryo

Question 10

what are the 3 germ layers of the embryo

Answer 10

ectoderm
mesoderm
endoderm

Question 11

what germ layer is formed on week 2

Answer 11

mesoderm

Question 12

what germ layer is formed on week 3

Answer 12

ectoderm

Question 13

what 3 things does the ectoderm develop into

Answer 13

skin
eyes
CNS/PNS

Question 14

what does the mesoderm develop into

Answer 14

bones
skeletal muscle
urogenital system
cardiovascular system

Question 15

what is neurulation

Answer 15

ectoderm forms a neural tube

Question 16

which day does the posterior neuropore close at

Answer 16

28

Question 17

which day does the anterior neuropore close at

Answer 17

24

Question 18

what is spina bifida

Answer 18

failure of posterior neuropore to close

Question 19

what is anencephaly a result of

Answer 19

failure of anterior neuropore to close

Question 20

what is the prosencephalon, mesencephalon and rhombencephalon known as in the brain

Answer 20

forebrain
midbrain
hindbrain

Question 21

what does the heart develop from in embryos

Answer 21

cardiogenic mesoderm from the cranial end of neural tube

Question 22

what are haem angioblasts and myoblasts known as

Answer 22

blood islands

Question 23

what are haem angioblasts for

Answer 23

form endocardial heart tube

Question 24

which day are the primitive blood vessels formed

Answer 24

day 18

Question 25

how does the primitive heart tube form

Answer 25

fusing of endocardial tubes

Question 26

how does Cardiogenic mesoderm form heart tube

Answer 26

lateral folding process

Question 27

what does the sinus venosus form

Answer 27

coronary sinues

Question 28

what does the primitive ventricle form

Answer 28

left ventricle

Question 29

what does the bulbus cordis form

Answer 29

right ventricle

Question 30

what does the truncus arteriosus form

Answer 30

pulmonary artery

Question 31

what limits the elongation of the primitive heart tube

Answer 31

pericardium

Question 32

which days are vessels and major chambers aligned in the heart

Answer 32

day 23-28

Question 33

what are the 2 chambers of a side of heart connected by

Answer 33

atrioventricular canal

Question 34

how does the septum form to divide the left and right side of canal

Answer 34

endocardial cushions grow and fuse

Question 35

what is VSD

Answer 35

damage to the septum

Question 36

whats the job of the Septum Primum

Answer 36

separate the left atrium from the right ventricle

Question 37

what does secundum mean in the heart

Answer 37

ASD between the septum

Question 38

how does the foramen ovale form

Answer 38

when the septum secundum grows over the ostium secundum

Question 39

what happens during ductus venosus circulation

Answer 39

shunts blood from umbilical vein to IVC

Question 40

what happens during foramen ovale circulation

Answer 40

shunts blood from RA to LA

Question 41

what happens during ductus arteriosus circulation

Answer 41

shunts blood from pulmonary trunk to ascending aorta

Question 42

what happens when the right atrium pressure > left atrium

Answer 42

septum primum opens to shunt blood

Question 43

which gender is ASD more common in

Answer 43

females