A Polypeptide chain is a sequence of amino acids that is the foundation for the basic structure of a protein
What we see can send panic signals to our endocrine system and then have an effect on systems from there. and also if we see something we are scared of it can stop our breathing, make us scream, close our eyes and other things.
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Juglar Vein
This vein drains blood from head to heart.
Sub-clavian Vein
This vein drain blood from shoulder to heart.