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so that the chick can get oxygen while its developing
A developing chick nourishes itself inside the eggshell through the egg yolk. This is the chicks source of food.
If the cells did not specialize than there would be no chick developing.
The developing chick feeds on the yolk sac, much like the baby of live bearing animals attaches to the placenta. The chick has enough nutrients when born to got 24 hours without beginning on chick starter.
The uterus supplies nourishment to the developing foetus - a plentiful blood supply ensures maximum transfer of energy from the mother to the unborn baby.
bread
The developing chick feeds on the yolk sac, much like the baby of live bearing animals attaches to the placenta. The chick has enough nutrients when born to got 24 hours without beginning on chick starter.
Supply with oxygen= aerate
It is the supply of oxygen to the heart; the oxygen is carried by the blood. When there's insufficient blood supply, oxygen supply is low too, and angina results. See http://en.wikipedia.org/wiki/Angina_pectoris
When a bird's egg is fertilized, a chick is developing inside.
A developing baby gets its oxygen from the blood traveling through the umbilical cord.
The word used to define "to supply oxygen to" is oxidate.