Match Each Term with Its Definition

Match each term with its definition.
-grey crescent

A) undifferentiated muscle cells
B) pigmented layer of cytoplasm opposite from point of entry of sperm
C) rounded layer of cells at the surface of yolk in birds
D) solid rod of tissue that is involved in neurulation
E) fingerlike extensions into the endometrium
F) clear fibrous protein
G) programmed cell death
H) event when a group of cells influences a nearby group of cells