Embryonic Development

Question 0

During 7 days after fertilization, single-celled zygote turns into

Answer 0

Gastrula

Question 1

Ovum fertilization by sperm produces

Answer 1

Zygote

Question 2

Zygote = \_\_\_\_ cell
Two-cell stage = \_\_\_\_\_ cells
Four-cell stage = \_\_\_\_\_ cells
Morula
Blastula
Gastrula

Answer 2

1, 2, 4

Question 3

Implantation begins on day:

Answer 3

8

Question 4

Around time of implantation, at the point of development called ________, cells are dividing more rapidly on one side of embryo than the other

Answer 4

Gastrulation

*layers that will eventually form 3 distinct regions of the body are visible under microscope

Question 5

Three germ layers:

Answer 5

Ectoderm
Mesoderm
Endoderm

Question 6

Ectoderm will form…

Answer 6

Integumentary
Some skeletal
Nervous
Some endocrine
Respiratory
Digestive

Question 7

Mesoderm will become…

Answer 7

Skeletal
Muscular
Endocrine
Cardiovascular
Lymphatic
Urinary
Reproductive

Question 8

Endoderm will become…

Answer 8

Some endocrine
Respiratory
Digestive
Some urinary
Some reproductive

Question 9

Temporary nourishment for embryo is from what?

Answer 9

Yolk sac

Question 10

What contains fluid that protects embryo?

Answer 10

Amnion - amniotic fluid

Question 11

What encapsulates the amnion and invades the endometrium for the formation of the placenta?

Answer 11

Chorion

Question 12

1

Answer 12

Ovary

Question 13

2

Answer 13

Primary oocyte

Question 14

3

Answer 14

Oocyte with corona radiata

Question 15

4

Answer 15

Developing fluid filled vesicular follicles

Question 16

5

Answer 16

Ovulating follicle

Question 17

6

Answer 17

Corpus luteum

Question 18

7

Answer 18

Corpus albicans

Question 19

8

Answer 19

Mature ovum discharged from follicle

Question 20

9

Answer 20

Fimbriated end of oviduct

Question 21

10

Answer 21

Ovum in oviduct with sperm ready to penetrate (fertilization first day -B)

Question 22

11

Answer 22

Oviduct

Question 23

12

Answer 23

Cleavage of fertile ovum (C)

Question 24

13

Answer 24

Morula (third day -D)

Question 25

14

Answer 25

Embryonic vesicle enters uterus (4th or 5th day)

Question 26

15

Answer 26

Implantation of vesicle begins in endometrial epithelium (7th day)

Question 27

16

Answer 27

Corpus of uterus

Question 28

17

Answer 28

Fundus of uterus

Question 29

18

Answer 29

Myometrium

Question 30

19

Answer 30

Cervix of uterus

Question 31

20

Answer 31

Endometrium

Question 32

21

Answer 32

Vagina

Question 33

22

Answer 33

Nucleus of ovum

Question 34

23

Answer 34

Zona pellucida of ovum

Question 35

24

Answer 35

Corona radiata of ovum

Question 36

25

Answer 36

Sperm cell

Question 37

26

Answer 37

Yolk sac

Question 38

27

Answer 38

Embryonic disk

Question 39

28

Answer 39

Amnion

Question 40

29

Answer 40

Embryonic placenta (trophoblast tissue)

Question 41

30

Answer 41

Body of embryo

Question 42

31

Answer 42

Amnion/amniotic cavity

Question 43

32

Answer 43

Developing heart

Question 44

33

Answer 44

Yolk sac

Question 45

34

Answer 45

Yolk sac stalk

Question 46

35

Answer 46

Allantoic diverticulum Allantois, origins of tissues of urinary bladder

Question 47

36

Answer 47

Body stalk

Question 48

37

Answer 48

Extra embryonic coelom (cavity)

Question 49

38

Answer 49

Chorion

Question 50

39

Answer 50

Placental villi

Question 51

40

Answer 51

Belly stalk (developing umbilical cord)

Question 52

41

Answer 52

Forebrain area

Question 53

42

Answer 53

Midbrain area

Question 54

43

Answer 54

Hindbrain area

Question 55

44

Answer 55

Eye

Question 56

45

Answer 56

Developing outer ear

Question 57

46

Answer 57

Heart prominence

Question 58

47

Answer 58

Liver prominence

Question 59

48

Answer 59

Differentiating somites

Question 60

49

Answer 60

Tail

Question 61

50

Answer 61

Notches between digital rays of hand

Question 62

51

Answer 62

Toe rays

Question 63

52

Answer 63

Embryo with membranes in situ