embryology

Question 1

How many weeks long is the embryonic period?

Answer 1

8 weeks

Question 2

When does the zygote form?

Answer 2

during fertilization

Question 3

What happens in cleavage?

Answer 3

rapid cell division to form cluster of cells then blastocyte

Question 4

When do the germ layers form and the establishment of body axes?

Answer 4

gastrulation

Question 5

What occurs during morphogenesis?

Answer 5

formation of body plans, embryonic scaffolding and development of shape

Question 6

what occurs during organogenesis?

Answer 6

the start of organ development

Question 7

Name 3 things which can influence development?

Answer 7

1. genetics
2. epigenetic
3. environment e.g drinking alcohol during pregnancy

Question 8

Name the 6 phases of embryogenesis?

Answer 8

1,gametogenesis

2. fertilization
3. cleavage
4. gastrulation
5. morphogensis
6. organogenesis

Question 9

Where does fertilization take place?

Answer 9

apulla of uterine tubes

Question 10

What week of embryogenesis does gastrulation take place?

Answer 10

week 3

Question 11

during gastrulation what does the ectoderm become?

Answer 11

the epidermis of skin and nervous system

Question 12

during gastrulation what does the mesoderm become?

Answer 12

1. paraxial-dermis, voluntary muscles, axial skeleton
2. intermediate-urogenital systems
3. lateral plate-somatic mesoderm (lines body wall) , visceral mesoderm (covers organs)

Question 13

During gastrulation what does the endoderm become?

Answer 13

lining of gut tube and lining of respiratory tract