An opening in the membranes surrounding the ovum, by which nutrition is assisted and the entrance of the spermatozoa permitted.
a small opening at the anterior end of an insect egg that allows the entry of sperm for fertilisation.
The opening in the egg covering through which fertilization occurs.
The end of the embryo sac where the egg cell and synergids are located.
On the surface of the egg, there is a small indention with a miniscule hole known as the micropyle. This hole allows for the developing embryo inside to respire.
The minute opening in a butterfly egg.
The micropyle is the large depression at the top of a butterfly's egg. This small pit marks where the sperm entered the egg. While the egg is developing, air and water enter the egg through the micropyle.
In nematodes: A minute opening in the membrane of an egg through which the spermatozoa enter. ( 14)