When an egg is layed, how does the flech, blood, bones etc form? Are they formed from scratch? or is the existing material inside the shell is the flesh and bone but just in the right shape yet?
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You’ve seen an egg cracked open, I bet. See any bones?
The egg contains the raw chemical materials for the cells of the embryo to grow into a chick. Bones are formed from bone-forming cells and calcium. The white is mostly water and protein; the yolk is mostly water, fats, and protein. but there’s enough vitamins and minerals to supply the growing embryo. Sugars, DNA, and other chemicals of life are formed by breaking down the proteins and fats.
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