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

1/18

Click to flip

18 Cards in this Set

  • Front
  • Back
cleavage
succession of mitotic cell divisions without cell growth between division cycles.
blastula
A multicellular stage in which animals take on the form of a hollow ball.
gastrulation
Layers of embryonic tissues that will develop into adult body parts are produced.
gastrula
The deveopmental stage of gastrulation
larva
A free-living, sexually immature form in some animal life cycles that may differ from the adult in morphology, nutrition, and habitat.
radial symmetry
Characterizing a body shaped like a pie with many equal parts radiating outward
bilateral symmetry
Characterizing a body form that divides into two equal but opposite halves
cephalization
An evolutionary trend toward the concentration of sensory equipment on the anterior end of the body
dorsal vs. ventral
anterior vs. posterior
top/bottom
head/tail
What are the 2/3 germ layers that form the various tissues and organs of the body?
Endoderm
Ectoderm (1+2 = Diploblastic)
Opt: Mesoderm (Triploblastic)
Ectoderm
Body covering of the organism and gives rise to the central nervous system in some phyla.
Endoderm
* Innermost Germ layer
* Gives rise to lining of digestive tract and organs derived from it
What is a coelom?
A Fluid-filled space separating the digestive tract from the outer body wall.
Coelomates?
Animals with a true coelom
Pseudocoelmate
Have a body cavity only partially lined by tissue derived from mesoderm
Acoelomates
Lack a body cavity between digestive cavity and outer body wall
3 features of protosome development
1) Spiral and determinate
2) Schizocoelous: solid masses of mesoderm form coelom
3) Mouth develops from blastopore
3 features of deuterostome development
1) Radial and indeterminate (each individual cell can develop into a complete different embryo)
2) Enterocoelous: Folds of archenteron (inner digestive tube) form coelom
3) Anus develops form blastopore