Embryology Week 3 Flashcards Preview

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Flashcards in Embryology Week 3 Deck (21):
1

Gastrulation

Day 16
formation of Primitive Streak at caudal end

2

Primitive Pit and Groove

areas where cells leave primitive streak and move into interior of embryonic disc

3

Becoming Trilaminar

cells coming through primitive pit and groove replace hypoblast cells to make definitive endoderm
other cells go b/t endoderm and epiblast to make intraembryonic mesoderm

4

Ectoderm

new name for epiblast after gastrulation

5

Prechordal Plate

future mouth

6

Cardiogenic Plate

future Heart

7

Extraembryonic Mesoderm

Amnion, Yolk Sac, Allantois (future placenta)

8

Order of Migration from Cranial to Caudal during Gastrulation

Notochord
Head Mesoderm
Somites
Intermediate Mesoderm
Lateral Plate Mesoderm

9

Notochord

future vertebrae

10

Origin of Notochord

Primitive Node

11

Head Mesoderm

Unsegmented cells
form muscles of face, jaw, throat

12

Mesenchyme

mesodermal embryonic tissue that develops into connective and skeletal tissue; blood and lymph

13

Somites

part of mesoderm
37 pairs
future axial skeleton, muscles of neck, body wall, limbs, dermis of neck

14

Intermediate Mesoderm

connects somites with lateral plate mesoderm
future urinary system and gonads

15

Lateral Plate Mesoderm

Parietal and Visceral layers

16

Parietal Lateral Plate Mesoderm

forms lateral body wall

17

Visceral Lateral Plate Mesoderm

forms walls of gut tube

18

Steps of Neurulation

Formation of Neural Plate
Shaping of Neural Plate
Bending of Neural Plate
Closing of Neural Groove

19

Neural Induction

primitive node induces ectoderm to thicken to form the neural plate

20

Neural Plate

Earliest rudiment of CNS

21

Forming Neural Tube

Neural Plate folds on itself