788
S U B J E C T I N D E X
Yolk—continued
and reptile embryos, 5 8 3 - 4
separation o f blastoderm from, 553
Z i n c ,
chloride, and dorsalization, 551
requirement for, 111, 282
Z o n a fasciculata,
A C T H and, 603
Z o n a glomerulosa,
A C T H and, 603
Z o n a pellucida, 575, 580
Z y m o g e n granules,
function of, 473, 479
Z