Why are there arteries in the brain?

[jcmcems]

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i believe in miracles!!!

Haha, bleargh you are awesome! I have a serious question for you though: I'm ok with the brain, blood, lungs...but how does my French Press work? Its weird, I put in ground coffee and hot water, and within minutes I get this brown liquid that tastes like coffee. How does that happen?

 

[jcmcems]

Hey benito50, I want to help. Have you ever heard of the website wikimedia, wikipedio or wikigenie something?....I don't know the name exactly....you can probably wikipedia it. Anyways, I'm no expert, however I think you can probably find more facts about TBI than this forum. Or better yet, just Pubmed a good review, anything that contains the term "Annals" and comes from a top impact journal should be very very helpful.

 

[roseglass6370]

I'm by myself and this thread literally had my laughing out loud. I love SDN so much, lol. Thanks!

 

[neurosnap]

Actually, depending on your definition of what constitutes the brain, they might not be. One could say the cardiovascular system merely runs through the brain, but not a part of or inside of it because when you think about it, if the barrier into the brain is the BBB (blood-brain barrier), anything inside the BBB is the brain, anything outside isn't. But this is semantics, the reason is obvious: for oxygen and other vital nutrients the brain needs to maintain homeostasis.

 

[jcmcems]

Actually, depending on your definition of what constitutes the brain, they might not be. One could say the cardiovascular system merely runs through the brain, but not a part of or inside of it because when you think about it, if the barrier into the brain is the BBB (blood-brain barrier), anything inside the BBB is the brain, anything outside isn't.

Then by that rationale is the lumen of the GI tract not part of the GI system? It is separated by epithelial tissue which is much more significant of a barrier than the BBB.

 

[FIREitUP]

did anyone just flashback to President Clinton saying: "depends on what your definition of is is"?

 

[hiyaman]

Is the world round? Is it flat?
How come no one can tell me that?

 

[HealthHare]

Why are there arteries in the brain when blood is toxic to neuronal tissue?

Well thanks for the comment from the peanut gallery

 

[LuciusVorenus]

Is the world round? Is it flat?
How come no one can tell me that?

http://theflatearthsociety.org/cms/

 

[Geekchick921]

yea and i'm the king of atlantis.

OMG, bleargh... you're Aquaman? Awesome! 😀

 

[Kaustikos]

Wow, you guys are being absolutely too harsh to some person just wanting to learn some facts about the brain.. instead of mocking the person for asking a question ("how can you be a grad/physician if you don't know.."), why don't you just simply answer or send a link to help.

In my view, one of the most important qualities in physicians is being able to educate others.. if you can't do that, then maybe YOU don't belong here.

Anyway, I thought it was a legit question, OP.. blood cells are toxic to neurons if they're in direct contact with them, but since a protective layer envelopes the brain and arteries (ex. pia mater, an inner membrane, rich with arteries), blood doesn't cross through. Also the arteries' cells are tightly connected, so only small molecules such as oxygen and glucose can pass (aka BBB).

Oh, you're just so.... cute. I can't wait until you're initiated!

 

[Siggy]

Something else to keep in mind is that not all of the brain is protected by the BBB, such as the circumventricular organs in the brain.