ostriches
*EDIT*
WHile Ostriches lay the largest eggs, the whale shark that was responsible for the discovery of the largest egg in the world, which was 27 cm long and 15 cm broad. The egg might have been aborted since the whale shark gives birth to live kids.
an ostrich has the largest egg
ostrich in general but compared to body size kiwi lays the largest egg. octopus is the largest sea animal that lays the largest egg.
humans
the camel
Egg cells.
Ostrich
ostrich egg
The EGG of an ostrich.
an egg cell *** An egg (such as the chicken egg) is not one cell. The largest cells are usually neurons (some motor neurons can go from the spine or brain till the tip of the toes, so in larger animals that can mean a cell which is more than a meter long.
The single largest cell is that of an egg
The humpback whale produce the world's largest scat. However, this is surprising because the blue whale is the largest animal on earth.
The animal that is hatched out of the larger egg (e.g. emu) ends up waaaaaay bigger than the animal in the smaller egg (e.g. spider).