Strong protein strands called chalaza are attached to both sides of the yolk. Chalaza holds the yolk centered within the albumen (egg white).
The human embryo is implanted into the wall of the uterus.
skin
The embryo which is firstly a blastocyst is implanted snuggly into the uterus wall and remains and kept in place there for 9 months. The uterus wall is made up of blood, that is normally shed when a woman does not become pregnant, that explains the absense of a period when a woman is pregnant.
A bird is kept in an aviary also called a cage or bird cage.
A bird can live in a bird box or a burrow underground.
The bird embryo develops inside the protective shell of the egg, using the egg yolk as a source of energy and materials from which it will develop.
There is an embryo within the bird's reproductive track. This embryo eventually receives a tough calcium shell that hardens just before the bird is ready to lay the egg.
There is an embryo within the bird's reproductive track. This embryo eventually receives a tough calcium shell that hardens just before the bird is ready to lay the egg.
it is a penguin in which lives in Antarctica
It takes about one day.
Initial development of the egg, including the embryo, begins inside the mother bird after she mates with a male. The embryo, yolk, and shell initially form together. After the egg is laid the bird embryo continues to grow, drawing the nutrients it needs from the yolk.
yes, it can it just needs to be kept in a warm place