Egg shell
It is primarily calcium carbonate in an organic matrix. The composition of egg shell is given in Table. This portion of the egg is inedible.
Table: Percentage composition of egg shell
Component
Percent
Calcium carbonate
93.07
Magnesium carbonate
1.39
Phosphorus pentoxide
0.76
Organic matter(matrix protein and polysaccharide)
4.15
The composition of egg white and yolk differ considerably. The lipid content of albumin is negligible when compared to yolk. A very small amount of glucose is present in the egg white. Table gives percentage composition of egg white and yolk.
Table : percentage composition of egg white and yolk
Nutrients
Egg white
Egg yolk
Water
88.0
48.0
Protein
11.0
17.5
Fat
0.2
32.5
Minerals
0.8
2.0
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