• Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
Front

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

image

PLAY BUTTON

image

PLAY BUTTON

image

Progress

1/29

Click to flip

Card Range To Study

through

29 Cards in this Set

  • Front
  • Back
Pre embryonic Period takes place
the first 2 weeks after conception
Site of implantation is important because
that is where the placenta develops
(normally in the fundas)
Fundas is the best area for implantation because
1) It is richly supplied wih blood
2) The uterine lining is thicker (prevents placenta from attaching too deep)
3) Limits blood loss after birth (muscle is stonger here allowing te blood vessels to compress)
EMbryonic period takes place
3rd to 8th week
Embyonic period major events
cell differention takes palce
all major organ systems are in place and many are functioning
2nd week
events
implantation is complete
cells for fetal membranes develop
3rd week
events
embryonic disk develops
(develop major body systems)
The heart begins to beat
Fourth week
events
neural tube closure is complete
Fifth week
events
head grows rapidly
6th week
events
head is bent over chest
heart has 4 chambereed form
extemities grow
7th week
growth and refinment
most of intestines are contained in the umbilical cord
8th week
events
embryo has definate human form
Fetal period is
9th week to birth
Weeks 9 through 12
body grows faster than head
intestinal contens are now contained in the abdomen
fetus produces urine
sex can be distinguished
week 13-16
fetal movements are felt
week 17 -20
vernous caseosa covers the baby to protect it from amniotic fluid
eybrows and hair appear
brown fat develops- helps the fetus maintan temperature
week 21 - 24
lungs produce serfactant
week 25though 28
maturation of lungs,cns and pulmonary capillaries
fetus assumes head down position
week29-32
skin is pimented according to race
weeks 33-38
growth of all body systems continues
Placenta
major function
1)metobolic
2)transfer of substaces between mother and fetus
3) endocrine
Placents
maternal side circulation
-while in the intervillus space, blood is breifly outside the mothers circlatory system
fetal arteries carry
deoxygenated blood and waste prducts from the fetus to the placenta
fetal vein carries
returns oxynegated blood to the fetus
Progesterone
functions
reduces uterine contraction
supresses maternal reactions to fetal antigens
Normal amniotic fluid amount
500-1000mL
Fetal shunts
function
circulate most of the blood away from the lungs and liver
(beause the fetus does not metabolize subtances or breath air)
Monozygotic twins
union of a single ovum and sperm with later division of the conceptus into 2
Dyzygotic twins
arise from 2 ova that are fertalized by different sperm
assosiated with fertility