Signal your body to prepare for repeated contractions
Get your muscles ready for usage and widen up
Sends more blood in your body everwhere to be used over and over again for respiration
( pls mark this brainliest i need a new rank )
A secondary source is anything written after the fact
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Viscosity is the only one that doesn’t affect the temperature at which magma forms
here are the structures i hope it helps
Answer:
primary, secondary, tertiary, and quaternary.