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dovahben

Last status update:
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Gender: male
Age: 26
Date Signed Up:8/10/2012
Last Login:9/25/2016
Location:Virginia
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Highest Content Rank:#3692
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Level 9 Content: New Here → Level 10 Content: New Here
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Content Views:12328
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Favorite Tags: arachnid (2) | spider (2) | tarantula (2)
Student, Spider keeper and firearm enthusiast. Also I drive large trucks with big engines for a living at the moment.

latest user's comments

#14 - I know muscles need oxygen, especially when being worked; but …  [+] (2 replies) 08/08/2016 on Blood vessels 0
#16 - lordfohawk (08/08/2016) [-]
I also don't think I understood your question lol
#15 - lordfohawk (08/08/2016) [-]
I doubt it since this picture shows the vessels going through the kidneys where theyre just as integrated, if not more
#8 - Over 70 percent of firefighters in the US are volunteer. Some …  [+] (1 reply) 08/08/2016 on Corrupt Firefighter +15
#44 - bann (08/08/2016) [-]
He's not wrong. Also huge credit card fraud, they'll steal SSN's from fire safety boxes.
#10 - I ave a question if there are any biology peeps out there. Loo…  [+] (6 replies) 08/08/2016 on Blood vessels +6
#17 - donfailed (08/08/2016) [-]
From what I remember from anatomy, here's a bit about blood. Blood is really fucking efficient. It's got a simple little trick where it has set points on when to release oxygen. It's fully oxygenated in the lungs at a set point below regular atmospheric oxygen levels, giving the organism leeway to live in places with less oxygen in the atmosphere. In the body, which will always have a lower oxygen level than the atmosphere, it reaches areas of muscle with varying oxygen levels and releases oxygen accordingly due to its set points, AKA it releases more oxygen the less oxygenated the surrounding tissue is. Note the gigantic descending aorta going down from the heart and splitting into the huge illiac arteries heading into the legs. What seems to be missing is the equally fucking huge inferior vena cava, AKA the main vein that feeds deoxygenated blood from the lower half of your body back to your heart. Your legs get damn good circulation.

To answer why there's a lot more arteries going around the head, fingertips, and arms? My guess is senses and precision of movement. Specialized tissue, including nerves, eat up a lot of energy. The tips of your fingers are extremely sensitive compared to the back of your hand. Larger muscles, technically, use up less energy than the tiny ones since they do fewer "Slow", large scale contractions. Meanwhile smaller, muscles with more precise movement will be doing many rapid, tiny contractions that can make small adjustments very quickly. Compare it to jogging vs. sprinting. Now, add to it the aforementioned efficiency of blood and bob's your uncle.

TL;DR The parts with more arteries are either doing more stuff or are managing the blood.
#18 - donfailed (08/08/2016) [-]
Fuck me, I shouldn't write shit at 5 AM. God damn grammatical trainwreck
#13 - lordfohawk (08/08/2016) [-]
muscles need blood vessels to deliver oxygen to them, they can however store a tiny bit of oxygen with their myoglobin, something no other organs do
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#14 - dovahben (08/08/2016) [-]
I know muscles need oxygen, especially when being worked; but it would seem as if there would be a ton of vessels and veins going through the biceps, triceps, quads, and abdominal area. Does a removal and dissection of the body remove the veins feeding the muscles?
#16 - lordfohawk (08/08/2016) [-]
I also don't think I understood your question lol
#15 - lordfohawk (08/08/2016) [-]
I doubt it since this picture shows the vessels going through the kidneys where theyre just as integrated, if not more
#78 - We bred them to ease our existence. A mutual benefit thing tha…  [+] (4 replies) 07/29/2016 on Dog feels +3
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#88 - thickpeepee (07/29/2016) [-]
Over 40 thousand years, to be exact.
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#130 - johrny (07/29/2016) [-]
If you look it up, wolves started this relationship. We threw the leftover out, which wolves eat, then these wolves start to protect us, so they have more leftovers.
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#135 - thickpeepee (07/29/2016) [-]
Yeah. Although, humans still had to do a fair bit of taming. You can get a crow to like you if you give it fries everyday, but the crow isn't a tamed crow yet.
#136 - johrny (07/29/2016) [-]
Thats why i said "Started" and not "hoped onto our lap and waited for its cuddles ^-^"