osteons

anonymous asked:

thank you at least I'm not the only person that mutters about how skeletons appear on TV. They are so inaccurate. Its a pet peeve, which is a problem when one loves crime shows.

I know right?!  I hope you know about the blog Powered by Osteons - real life biological anthropologist reviews episodes of Bones for accuracy.  I’ve actually learned a lot!  At the very least, I’m much more critical.

This is Kristina Killgrove. She works at the University of North Carolina and is a biological anthropologist whose research primarily focuses on theorizing migration in antiquity and on understanding urban development and collapse through the analysis of human skeletal remains.  She thinks that the best science story of 2011 is the sequencing of the Black Death genome.

Her blog: http://www.poweredbyosteons.org/

What other scientists think are the best stories of 2011: http://www.livescience.com/17668-scientists-studies-2011.html

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Scaling of Haversian canal surface area to secondary osteon bone volume in ribs and limb bones

  • by John G. Skedros, Alex N. Knight, Gunnar C. Clark, Christian M. Crowder, Victoria M. Dominguez,  Shijing Qiu, Dawn M. Mulhern, Seth W. Donahue, Björn Busse,  Brannon I. Hulsey, Marco Zedda and Scott M.Sorenson

"Studies of secondary osteons in ribs have provided a great deal of what is known about remodeling dynamics. Compared with limb bones, ribs are metabolically more active and sensitive to hormonal changes, and receive frequent low-strain loading. Optimization for calcium exchange in rib osteons might be achieved without incurring a significant reduction in safety factor by disproportionally increasing central canal size with increased osteon size (positive allometry). By contrast, greater mechanical loads on limb bones might favor reducing deleterious consequences of intracortical porosity by decreasing osteon canal size with increased osteon size (negative allometry). Evidence of this metabolic/mechanical dichotomy between ribs and limb bones was sought by examining relationships between Haversian canal surface area (BS, osteon Haversian canal perimeter, HC.Pm) and bone volume (BV, osteonal wall area, B.Ar) in a broad size range of mature (quiescent) osteons from adult human limb bones and ribs (modern and medieval) and various adult and subadult non-human limb bones and ribs. Reduced major axis (RMA) and least-squares (LS) regressions of HC.Pm/B.Ar data show that rib and limb osteons cannot be distinguished by dimensional allometry of these parameters. Although four of the five rib groups showed positive allometry in terms of the RMA slopes, nearly 50% of the adult limb bone groups also showed positive allometry when negative allometry was expected. Consequently, our results fail to provide clear evidence that BS/BV scaling reflects a rib versus limb bone dichotomy whereby calcium exchange might be preferentially enhanced in rib osteons," (read more/not open access).

(Source: American Journal of Physical Anthropology, in press 2013; top image University of New Mexico)

One of these things is not like the other.

Osteoporosis is a disorder, more common with increased age, in which bone tissue becomes thinner, resulting in brittle bones that are susceptible to breaking.

So, have a glass of milk (rich in vitamin D and calcium—two of the most important nutrients for bone health) while you’re scrolling through your dash today!

Want to learn more about the composition of bone? Click here to read our awesome Compact Bone, Spongy Bone, and Osteons—Oh My!

You can tell a lot about someone by the music they listen to. Hit shuffle on your music device and list the first 10 songs. RULES: No skipping. Be honest. Pass it on to 10 people.
Tagged by new mutual esther-day

1. How You Get the Girl - Taylor Swift
2. Un Coin Tranquille a Shibuya - Peppermoon
3. Bad Blood - Taylor Swift
4. Mosaic - Sungha Jung
5. Sing - Ed Sheeran
6. Marching Bands of Manhattan - Death Cab for Cutie
7. Clean - Taylor Swift
8. Je Te Veux - Peppermoon
9. Bomfalleralla - Afasi & Filthy
10. Mad Sounds - Arctic Monkeys

Surprisingly pleased with this list… I tag:
laxk transpar-nt dreamwithyoux bleachndlp kyhlee nadefucker osteon vulpwix actanonverbaa scruples

first real day of osteology was a success!

1. when i was talking with a girl on wendesday i introduced myself as tobi and it totally worked because we just talked about the office with this other boy

2. today i said my name was tobi to the whole class so cool

3. it was so cool we haven’t started to learn identification but it was cool we learned about primary and secondary osteons and bone growth and structure bones are so alive its radical

Scrumptious Fiend (2012)

Rallenemone (Wrallin’ M-O-Knee)

Alternative:

Ralle (as the word Rally)

Notable Ruinations:

Bones enlarged so much by hi-speed osteonic tantrums that the muscles initially couldn’t handle the tearing. Spurs erupt at conveniently symmetrical locations. Calcium mixed with keratin causing wicked sick claws.

4th degree burns on 94% of the body, creating a sort of doberman pinscher color scheme. Hair follicles lost entirely. (aftermarket hairplug jacks installed in occipital region)

By some miracle of nature, nipples converted into 6 luminous divets, and the bellybutton into 3, drawing to one gaping hole on the trunk of the body.

1.5 pelvises, stacked.

Anus nowhere to be found. The entire region is just a bony, hole-less continuation of the back. What would normally become waste is converted into pure energy, which powers the nips/navels/crotch.

Penis intact, housed in a luxurious cavity in which used to reside the digestive tract. This is assumed to be the reason behind the highly corrosive properties of his semen.

The aforementioned bellybuttons are fully functional in that they are literal belly buttons used to control the penis. Unknown keystrokes are used to sheath, unsheath, and manipulate the dimensions of it. There is supposedly a cheat code to disable ejaculation, but it, to the dismay of many, has yet to be discovered.

Train wreck

You’re pretty, but fucked up.” 

The man whom I dated (and casually fell in love with) for two years thinks that’s the closest to a veracious account of my existence. 

Read More

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Field Trip of Traditional Medicine Module, @PT.Sidomuncul Semarang, with Osteon and my great doctors and teachers :)