Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
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

A key: Read text to speech.a key

image

Play button

image

Play button

image

Progress

1/20

Click to flip

20 Cards in this Set

  • Front
  • Back
study of the development of a unicellular zygote into a complete multicellular organism
embryology
when more than one egg is fertilized
fraternal twins
series rapid mitotic divisions that characterize early embryonic develompent
cleavage
solid ball of embryonic cells
morula
fluid-filled cavity in the morula
blastocoel
hollow sphere of cells in the morula
blastula
when the morula develops the blastocoel that later becomes the blastula
blastulation
3-layered structure that was transformed from the single-layer blastula
gastrula
skin, hair, nails, epithelium of nose/mouth/anus, lens of eye, retina, nervous system
ectoderm
epithelial linings of digestive and respiratory tracts, liver, pancreas, thyroid, bladder lining
endoderm
musculoskeltal sytem, circulatory system, excretory system, gonads, connective tissue
mesoderm
3 primary germ layers in the gastrula form these three
ectoderm, mesoderm, endoderm
regions of the germ layers begin to develop into a rudimentary nervous system
neurulation
rod of mesodermal cells that develops along the longitudinal axis under the dorsal layer of the ectoderm
notochord
body organs begin to form
organogenesis
organs increase in size
growth
eggs/sperm develop
gametogenesis
lines the inside of shells, moist membrane that permits gas exchange
chorion
sac-like structure that is involved w/ respiration and excretion and contains numberous blood vessels to transport oxygen, carbon dioxide, water, salt, and wastes
allantois
membrane that encloses the amniotic fluid
amnion