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Flashcards in Embryology Deck (11)
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1
Q

Gastrulation

A

The process by which the 3 primary germ layers are formed. Where the basic body plan and primary body axes are established.

2
Q

What are the 3 primary germ layers?

A

Ectoderm

Mesoderm

Endoderm

3
Q

What is the area marked in red?

A

Inner cell mass –> embryo a.k.a. foetus proper

4
Q

What is the missing label?

A

Trophoblast –> placental and foetal membranes

5
Q

Name these two layers that the inner cell mass divides into

A

Epiblast

Hypoblast

6
Q

Where do the 3 germ layers arise from?

A

All 3 germ layers arise from the epiblast

7
Q

Ectoderm forms…

A
8
Q

Mesoderm forms…

A

Muscle

Bones

Blood

Blood vessels

Kidneys

Skin dermis

Connective tissue

9
Q

Endoderm forms…

A

Gut

Liver

Lungs

Pancreas

10
Q

Notochord

A

Extended column of cells

Induces the overlying ectoderm to thicken and form the neural plate.

The formation of the notochord is an extension of the gastrulation process.

11
Q

Neuroectoderm

A

cells of the neural tube.