Anatomy Lab 1

Question 1

Vitelline Membrane

Answer 1

a permeable sheet of protein that is located just outside the cell membrane. This membrane works as a barrier to prevent additional sperm from entering. (in unfertilized and fertilized egg picture)

Question 2

germinal vesicle

Answer 2

the nucleus of a primary oocyte. Enlarged by maternal-effect genes being transcribed at a high rate, it is light in color due to a large proportion of euchromatin. (in unfertilized egg)

Question 3

Blastomere

Answer 3

a general term for the cells of morula and blastula-stage embryos.

Question 4

Vegetal pole

Answer 4

side where the yolk is concentrated (blastula)

Question 5

Blastocoele

Answer 5

fluid-filled cavity inside early embryos

Question 6

Perivitelline space

Answer 6

area filled with fluid from the cortical granules between fertilization membrane and the plasmas membrane (fertilized egg)