Answer:
I'm sorry but what exactly is your question?
The vertebrate endoskeleton is internal while an arthropod's exoskeleton is not
Answer:
Protein is also used for growth and repair. Amid all these necessary functions, proteins also hold the potential to serve as a metabolic fuel source. Proteins are not stored for later use, so excess proteins must be converted into glucose or triglycerides, and used to supply energy or build energy reserves.
The answer is the nervous system.
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