Examlex
The internal skeleton of echinoderms is made of calcium-stiffened ____ that develop from mesoderm.
Glucose
A simple sugar and an important energy source in living organisms, also the main type of sugar in the blood.
Sodium
A chemical element with the symbol Na and atomic number 11, sodium is a soft, silvery-white, highly reactive metal that is a key component of table salt (sodium chloride).
Phenylalanine
an essential amino acid important for the biosynthesis of other proteins and amino acids in the body.
Insulin
A hormone produced by the pancreas that regulates blood sugar levels by facilitating the uptake of glucose into tissues.
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