Flashcards in Anatomy- Embryology Deck (42)
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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
