Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Trilaminar Stage
WVSOM Class of 2012 Trilaminar Stage
| Question | Answer |
|---|---|
| the first movement of the embryonic cell populations into 3 layers is what phase? | gastrulation |
| the cranial end of the primitive streak is called what? what is the caudal end called? | prechordial; cloacal |
| what organizes the embryogenic patterning and tissue differentiation? | hensen's node |
| what direction does primitive streak grow in? | posterior to anterior |
| if the primitive streak cells persist, what can happen? | sacrococcygeal teratomas |
| what do anterior-bound cells that are migrating between the epiblast and hypoblast form? | cardiogenic and notochord plate |
| because the first cells to pass through the primitive streak reach the anterior side first, what happens? | embryos develop anterior to posterior |
| a hollow, cartilaginous rod that extends through the midline is called what? | the notochord |
| when does the notochord degenerate? | apoptosis-sclerotomes develop into vertebrae |
| some portions of notochord persist as what structure in adults? | nucleus pulposis |
| epiblast cells that invaginate through primitive pit extend anteriorly to form what structure? | notochordal process |
| what comprises the the prechordal plate? | adherent hypoblast and epiblast cells |
| during regression, the notochordal process fuses with what? | the underlining endoderm |
| the transitory channel between amniotic cavity and yolk sac is called what? | the neuroenteric canal |
| the once-tubular notochordal process flattens to form what? | the notochordal plate |
| the notochordal plate folds in to become what? | the notochord |
| Epiblastic cells invaginate to form a narrow groove along the posterior medial line called what? | primitive groove |
| After invagination, primitive groove cells separate from the epiblast layer and migrate into the space between what layers? | epiblast and hypoblast |
| cells that do not pass through the primitive groove become what germ layer? | ectoderm |
| cells that displace the hypoblast become what cells? | endoderm |
| The cells that occupy the space between the endoderm and ectoderm generate what layer of cells? | mesoderm |
| the notochord is derived from what structure? | hensen's node |
| the lumen that forms in the notochordal process is called what? | notochordal canal |
| does the notochordal plate fold anteriorly-to-posteriorly or posteriorly-to-anteriorly to become the notochord? | anteriorly-to-posteriorly |
Created by:
mhassan
Popular Genetics sets