The developing embryo takes its nourishment from the yolk inside the egg. The embryo doesn't need air until it is ready to break out of its shell.
A farmer can purchase egg incubators online from the Global Industrial website. Alternatively, you can also purchase these incubators from the Incubator Warehouse website.
They eat, or absorb, the yolk of the egg.
Does it move reproduc sense feed breath excret or grow.
Egg incubators are a specific item that is not sold everywhere. EBay and Amazon are two places to find them though. You could also look for specialty stores that sell them.
From what I have been able to find online, bird incubators are hotter than reptile incubators and the egg turning feature of the bird incubators can kill reptiles.
There are a number of companies who sell incubators on line. Small incubators for home farms and schools are available from Hovibator, Surehatch, Novital are some names to search for. It depends on what quantity you intend to hatch as they range from 3 egg capacity to 1,000 eggs. Most home hobby hatchers find that 20 to 50 egg sizes are best. Try searching "Home hobby chicken incubators" on a search engine. You can also buy them and get advise from your local feed store or any business that sells poultry supplies.
Nexttag.com will have some egg incubators for you, They seem to be a good company 4.5 Star / 5 stars. There may be a few other websites selling this item too so look around on that market to find the best deal
Incubators can be used to hatch chicken eggs.
Farm supply shops sell incubators with turners inside. When turning them by hand put a x on one side and o on the other side to help remember if they have been turned.
The yolk is to feed the still developing animal inside, nutrients it needs before hatching
The size of egg is larger than sperm because the the sperm enters inside the egg and egg has to accommodate the sperm. And egg contains fats and nutrients in order to feed zygote in case of pregnancy.
Humans frequently do hatch the eggs of ducks and other birds (and reptiles) using incubators.