Gastrulation

Question 1

Poultry when and where hastrulation take place?

Answer 1

1st day in the infundibulum

Question 2

Poultry It is the formation of

Answer 2

Primitive streak
3 blastodermic layers (ectodern, mesoderm, endoderm)

Question 3

Mammals When does it take place

Answer 3

16 day old

Question 4

Mammals what happen

Answer 4

Formation of primitive streak
Epiblast and hypoblast cells migrate to the middle to give rise to the mesoderm

Question 5

Derivation of the ectoderm

Answer 5

Nervous system

Question 6

Ectodermis layers

Answer 6

-Neural plate
-Neural groove
-Neural Tube
-Neural crest

Question 7

Neural tube=

Answer 7

CNS

Question 8

Neural Crest

Answer 8

PNS

Question 9

Embryonary Ectoderm

Answer 9

Epidermis, hair, feathers, sense organs

Question 10

Extraembryonary ectoderm

Answer 10

Chorion (external part placenta)
Amnios (fluid inside placenta)

Question 11

4 part of the derivation of the mesoderm

Answer 11

Notochord
Paraxial
Intermediate
Lateral Plate

Question 12

Notochord=

Answer 12

Inductor, Intervertebral disc

Question 13

Paraxial mesoderm

Answer 13

-sclerotome: bone and cartilage
-dermatome: dermis
-myotome: skeletal muscle

Question 14

Intermediate Mesoderm

Answer 14

Nephrotome: kidney urinary system
Gonadal cells: genital system

Question 15

Lateral plates mesoderm

Answer 15

-Somatopleura: body cavity + Chorion and amnios
-Splachnopleura: Circulation system (blood)

Question 16

Derivation Endoderm

Answer 16

Respiratory system + digestive system and annex gland

Question 17

Body Shape

Answer 17

1. Lengthening of the body (allongement)
2. Body folding (separation)
3. Embryo and annexes separation
4. Tail formation
5. Division of the body in head and trunk
6. Development of the limb