Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
25 Cards in this Set
- Front
- Back
|
The product of fertilization of an egg is a single cell called a
|
zygote
|
|
|
zygote can be up to how many cells
|
any number under 16
|
|
|
once a zygote splits to 16 cells it is called a
|
morula
|
|
|
after a morula it becomes a
|
blastula
|
|
|
when the edges of the cell starts to indent on one side it becomes a
|
gastrula
|
|
|
the hollow space in a blastula or gastrula is called
|
blastocoel
|
|
|
the indent pushes further and creates a "bubble in the center this "bubble" that eventually becomes the digestive tract is called the
|
archenteron
|
|
|
the opening to the archenteron is called the
|
blastopore
|
|
|
ectoderm is ______ and gives rise to
|
outer layer; skin, nerve, tissue
|
|
|
mesoderm is the ______layer and gives rise to
|
middle/inner; muscle, connective tissues, bone
|
|
|
endoderm is the _____layer and gives rise to
|
inner; lining of digestive tract, lining of blood vessels, lining of heart chambers, lining of lungs
|
|
|
primitive gut is called
|
archenteron
|
|
|
In the gastrula stage the formation of these four primary tissues begins
|
epithelial, connective, muscle, nerve
|
|
|
this lines a free surface and/or secretes (acts as a gland)
|
epithelial
|
|
|
examples of connective tissues
|
bone, cartilage, tendons, ligaments, apipose (fat), blood
|
|
|
animals with no body symmetry are called (without specific shape)
|
amorphous
|
|
|
radial symmetry is_______these animals are also________
|
animals that have a top and bottom but no left or right. radial slices will always be equal; diploblastic
|
|
|
bilateral symmetry is_________ and are also________
|
when an animal has distinct dorsal, ventral, anterior, and posterior surfaces. cutting them longitudinally there would be two mirror images; triploblastic
|
|
|
diploblastic
|
2 layers. ecto and endo
|
|
|
triploblastic
|
3 layers. ecto, endo, mesoderm
|
|
|
the only cavity in acoelomate animals is
|
coelm
|
|
|
coelomate animals have a _______ AND a distinct ____ which i lined entirely in _______ tissue
|
digestive cavity; coelm; mesodermal
|
|
|
pseudocoelomate animals have ____________which means
|
pseudocoelom; doesn't have true mesoderm.
|
|
|
In ______ the blastopore develops into the adult mouth
|
protostomes
|
|
|
the blastopore becomes the _______ and another opening which forms later becomes the ______in _______
|
anus; mouth; deuterostomes
|
