Embryonic development in days Flashcards by Nell Cuthbertson

Q

Day 1

A

Fertilisation

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Q

Day 2

A

Two cell stage

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Q

Day 3

A

Morula

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Q

Day 4

A

Early blastocyst

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Q

Day 5

A

Late blastocyst

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Q

Day 6-7

A

Implantation into endometrium of uterus

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Q

Day 8

A

Bilaminar disc forms

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Q

Day 9

A

Trophoblast with lacunae

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Q

Day 10-11

A

Embryo in uterus 10-11 days after ovulation

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Q

Day 12

A

Extraembryonic mesoderm develops

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Q

Day 13

A

Uteroplacental circulation begins

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Q

Day 14

A

Embryonic disc: dorsal view

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Q

Day 15

A

Laterally established

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Q

Day 16

A

Gastrulation: formation of germ layers

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Q

Day 17

A

Epiblast forms germ layers

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Q

Day 18

A

Trilaminar embryoic disc

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Q

Day 19

A

CNS induction

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Q

Day 20

A

Neurulation: neural folds elevate

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Q

Day 21

Study These Flashcards

A

Transverse section through somite region

Q

Day 22

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A

Neural tube closure begins

Q

Day 23

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A

Neural tube zippers

Q

Day 24-25

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A

Villus formation continues in the placenta

Q

Day 26

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A

Pharyngeal arches present

Q

Day 27

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A

Somites continue to develop

Day 28

Neurulation complete

Day 29

Arm and leg buds

Day 30

Developing face

Day 31

Gut development

Day 32

Embryo in chorionic cavity

Day 33

Umbilical ring

Day 34

Optic cup and lens placode

Day 35

Branchial arches and clefts

Day 36

Physiological umbilical hernia

Day 37

Developing face

Day 38

Muscle development

Day 39

Endodermal derivatives

Day 40

Auricular hillocks

Day 41

Atrial septum formed

Day 42

Digit formation

Day 43

Limb cartilages and digital rays

Day 44

Developing face

Day 45

Conotruncal and ventricular septa

Day 46

Day 47

External genitalia

Day 48

Facial prominences fused

Day 49

Digits present, eyelids forming