Anatomy- Embryology Flashcards Preview

NPLEX I > Anatomy- Embryology > Flashcards

Flashcards in Anatomy- Embryology Deck (42)
1

What days of the menstrual cycle form the menstrual phase?

Days 1-4

2

The secretory or Luteal phase occurs on what days of the menstrual cycle?

Days 15-28

3

The proliferative or follicular phase occurs what days of the menstrual cycle?

Days 4-14

4

What hormone is released to promote development of the follicle?

FSH

5

What causes a surge in LH?

Estrogen

6

What is a zygote?

Diploid cells resulting from union of sperm and ocum

7

What structure consists of 12-15 blastomeres?

Morula

8

What contains a fluid-filled cavity that separates the blastomere into two parts?

Blastula

9

How soon after fertilization does implantation in the endometrial epithelium of the uterus take place?

6 days

10

What forms the wall of the gestational or chorionic sac?

Chorion membranes

11

What forms the floor of the amniotic cavity?

Epiblast

12

What forms the roof of the exocoelomic cavity?

Hypoblast

13

What is the process of bilaminar embryonic disc development into trilaminar embryonic disc called?

gastrulation

14

What are the three trilaminar layers called?

Ectoderm, Mesoderm, Endoderm

15

What germ layer forms epithelial lining of the respiratory tract?

Endoderm

16

What germ layer forms smooth muscle and smooth muscle coat?

Mesoderm

17

What layer forms the blood cells?

Mesoderm

18

What germ layer forms the bone marrow?

Mesoderm

19

What germ layer forms the central and peripheral nervous system?

Ectoderm

20

What germ layer forms connective tissue?

Mesoderm

21

What germ layer forms the CV system?

Mesoderm

22

What germ layer forms the epidermis?

Ectoderm

23

What germ layer forms the excretory organs?

Mesoderm

24

What germ layer forms the glands opening into the GI tract?

Endoderm

25

What germ layer forms the glandular cells of the liver and pancreas?

Endoderm

26

What germ layer forms the GI tract lining?

Endoderm

27

What germ layer forms the reproductive organs?

Mesoderm

28

What germ layer forms the retina of the eye?

Ectoderm

29

What germ layer forms the skeleton?

Mesoderm

30

What germ layer forms the striated muscle?

Mesoderm

31

What germ layer forms the vessels?

Mesoderm

32

The embryonic foramen oval becomes what structure after birth?

Fossa ovalis

33

The embryonic ductus arteriosus becomes what structure after birth?

ligamentum arteriosum

34

The embryonic ductus venous becomes what structure after birth?

ligamentum venousum

35

The embryonic umbilical vein becomes what after birth?

ligamentum teres

36

The embryonic umbilical arteries become what after birth?

Umbilical ligaments

37

What fetal organs are developed at 4 weeks gestation?

heart, forebrain, upper and lower limbs, ears, lens of the eye

38

At what stage does the external auditory canal develop?

6 weeks

39

At what stage do the digits and external genitalia develop?

8 weeks

40

At what stage do the intestines develop?

7 weeks

41

At what stage does the ossification of bone begin?

7 weeks

42

Describe the schema for fetal circulation

Oxygenated blood from placenta via umbilical vein bypasses liver through the ductus venous into IVC and right atrium, Through foramen oval to the left atrium and left ventricle
or, directly into right ventricle to pulmonary trunk to ductus arteriosus, lungs or aorta, from aorta to upper and lower body