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Fourth???
zedek3147 3 years ago
How were the jugular veins evolved? did the brain have ample supply of blood and the tissues of the head? before it was evolved enough to work?
when did the pulmonary arterty evolve? what stage? how did the lungs get blood before it evolved?
When did the Brachial Artery evolve, what stage? how did the upper parts get blood pumped to it before it evolved?
StudentatWar 4 years ago
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(Reply)
DON'T READ!!!
SO SORRY
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rajko22 4 years ago
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PLEASE DON'T READ THIS you will die in seven days if you don't post this comment on 10 videos in the next hour. if you do, tommorrow will be the best day of your life
Pretty101Gal 4 years ago
second
bigfaggykitty 4 years ago
first
ucantcme123 4 years ago