Lab Test 3 Flashcards
Are the sea star eggs examples of isolecithal, mesolecithal, centrolecithal, or telolecithal eggs?
Isolecithal because you can’t see the yolk because it’s evenly distributed
Were the gastrulas we saw in lab an example of enterocoely or schizocoely?
Enterocoely because of the pockets on the later staged gastrula
Were the gastrulas we saw in lab an example of deuterostomes or protostomes?
Deuterostomes, but not vertebrates
Stage before its a blastula, but when it’s a complete ball
morula
cells that form the blastula
blastomere
the opening at the beginning gastrula stage
blastopore
cavity in the late staged gastrula that’s lined with mesoderm
coelom
What type of tissue is blood?
connective tissue
What is the purpose of a basement membrane (from this lab presentation)?
It attaches the cells to the rest of the body, plus it’s the area of entrance for nutrients
How do you identify whether a shark is male or female?
males have claspers
What organ is the spiral valve in?
ileum
What are the two stomach regions in sharks?
cardiac and pyloric
What are the two regions of the small intestine in sharks?
duodenum and ileum
what is the swirly line that runs down the kidney of a shark?
mesonephric duct
What are the thin, dark lines in loose connective tissue?
elastic fibers
What are the thick, clear lines in loose connective tissue?
non-elastic fibers
A hole where a dead cell is after it is encased in its own cartilage
lacunae
What is the center part of the bone?
Haversian canal (central canal)
What are the darker spots in the bone?
lacunae
What are the darker lines that connect the Haversian canal to the lacunae in bone?
canaliculi
What characteristic defines cardiac muscle?
branches and reunites
What are the darker strips in cardiac muscle?
intercalated disks
What are the five major characteristics of the Chordata?
1) a dorsal, hollow nerve chord
2) a notochord
3) paired pharyngeal slits
4) an endostyle
5) a postanal tail
