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Flashcards in Embryology Deck (22):
1

During the first week fertilization occurs when the

Sperm passes through Corona Radiata, then Zona Pellucida

2

Mitosis of the zygote forms a ball of cells, or a ________

Morula

3

Fluid enters the Zona Pellucida and separates the Blatomeres into _____ and _____

Trophoblast
Embryoblast/Inner Cell Mass

4

Formation of Trophoblast and Inner Cell Mass notes formation of

Blastocyst

5

The Trophoblasts will differentiate into

Syncitiotrophoblast
Cytotrophoblast

6

______ induces endometrial stroma

Syncitiotrophoblast

7

A ______ will appear between Trophoblast and Inner Cell Mass during the 2nd week

Amniotic Cavity

8

The amnion is formed by

Amnioblasts from Cytotrophoblast

9

During the 3rd week the development of the 3-layred embryo begins as cells migrate between _____ and _____ to form the Mesoderm

Ectoderm and Endoderm

10

Within the _____ is the Primitive Streak

Ectoderm

11

The Primitive Streak is composed of

cells hat pass through cephalic region to form notochord process

12

The mesoderm will differentiate into ______, _____ and ______ Mesoderm

Paraxial
Intermediate
Lateral

13

Paraxial Mesoderm breaks into segmented blocks called ______

Somites

14

Myotome becomes_____, Sclerotome becomes ______, and Dermatome becomes _______

Muscle mass
Vertebrae and discs
CT of skin

15

Intermediate Mesoderm gives rise to

Urogenital System

16

Lateral Mesoderm gives rise to

CT of muscles and viscera
Serous Membrane
Cardio and Lymph System
Spleen
Adrenal Cortex

17

Notochord process thickens to become ______ and eventually become ______

Neural Fold
Neural Tube

18

Lateral folding that occurs during the 4th week of embryonic growth establishes the

Foregut, Midgut, Hindgut, and Stomadeum

19

______ separates the Foregut from Stomadeum

Buccopharyngeal membrane

20

Endoderm derivatives include

Respiratory system
Liver
Pancreas
Thyroid

21

Ectoderm derivatives include

Epidermis
Mammary Gland
Anterior Pituatary
Enamel

22

Neuroectoderm will differentiate into

Ectomesenchyme