Bio Lab Development

Question 1

Blastocel

Answer 1

fluid-filled cavity

Question 2

vegetal pole

Answer 2

large concentration of yolk

Question 3

animal pole

Answer 3

less concentration of yolk

Question 4

ectoderm

Answer 4

outer layer
epidermis of skin
nervous and sensory systems
pituitary gland, adrenal medulla
germ cells

Question 5

endoderm

Answer 5

lines embryonic digestive tract
epithelial lining of digestive tract
epithelial lining of respiratory, excretory, and reproductive tracts
thymus, thyroid, and parathyroid glands

Question 6

mesoderm

Answer 6

middle layer
skeletal and muscular systems
excretory and reproductive systems (except germ cells)
dermis of skin
adrenal cortex

Question 7

archenteron

Answer 7

formed when cells drastically rearrange from shallow depression to a narrow, deep tube (primitive gut)

Question 8

blastopore

Answer 8

open end of archenteron. will become anus. (will become mouth first in protosomes)

Question 9

notochord

Answer 9

rod that runs along dorsal side of chordate embryo. formed from cells coming together. disappear before birth

Question 10

somites

Answer 10

formed from groups of cells from the mesoderm lateral to the notochord. separate into blocks. major role in forming vertebrate (and repeated structures)

Question 11

neural groove

Answer 11

formed from ectoderm. becomes neural tube.