Egg
Videos
An egg is an organic vessel grown by an animal to carry a possibly fertilized egg cell – a zygote. Within the vessel, an embryo is incubated until it has become an animal fetus that can survive on its
Salmon eggs in different stages of development. In some only a few cells grow on top of the yolk, in the lower right the blood vessels surround the yolk and in the upper left the black eyes are visible.
Diagram of a fish egg: A. vitelline membrane B. chorion C. yolk D. oil globule E. perivitelline space F. embryo
Salmon fry hatching. The larva has grown around the remains of the yolk and the remains of the soft, transparent egg are discarded.
Moor frog eggs utilize glycans to form a hydrophilic jelly coat that protects the egg
Bird egg
Videos
A bird egg is the reproductive structure produced by female birds, consisting of a hard, calcareous shell that encloses nutrient-dense yolk, protective albumen, and embryonic membranes, providing a se
Egg
…cells". Most arthropods, vertebrates (excluding live-bearing mammals), and mollusks lay eggs, although some, such as scorpions, do not. Reptile eggs, bird eggs, and monotreme eggs are laid out of water and are surrounded by a protective shell, either flexible or inflexible. Eggs laid on land or in nests are…
Eggs of various birds, labelled (Trinity College Zoological Museum, Dublin)
Guillemot eggs
Almost spherical bird egg (Senegal parrot)
Long, "elliptical" bird egg (Common murre)