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"In ostriches, the upper kneecap looks similar to the single kneecap in most other species, but the lower kneecap resembles a fixed bony process, like the point of your elbow," says Ms Regnault. "As far as we know, this double kneecap is unique to ostriches, with no evidence found even in extinct giant birds."
A go bag essentially has the same stuff as a get home bag. The two are easier to pack than a bug out bag since they don't need as many supplies....
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Read More »Ostriches are the only animals in the world to have a double-kneecap, but its purpose remains an evolutionary mystery. PhD student, Ms Sophie Regnault, from the Royal Veterinary College, UK says "understanding more about different kneecap configurations in different animals could help to inform prosthesis design, surgical interventions, and even robots with better joints." "In ostriches, the upper kneecap looks similar to the single kneecap in most other species, but the lower kneecap resembles a fixed bony process, like the point of your elbow," says Ms Regnault. "As far as we know, this double kneecap is unique to ostriches, with no evidence found even in extinct giant birds." From Ms Regnault's results, it appears that the ostrich's double-kneecap counter-intuitively decreases the mechanical advantage of the knee extensor muscles, while in other species including humans, it has more mixed effects: increasing mechanical advantage at some knee joint angles and decreasing it at others. The effect that this double-kneecap has on the running performance of ostriches is hard to identify, but Ms Regnault and her team have a few ideas: "We speculate that this might mean ostriches are able to extend their knees relatively faster than they would with one kneecap." Using a combination of CT scans and fluroscopy known as 'X-ray reconstruction of moving morphology' (XROMM) on a real ostrich leg, Ms Regnault and her team built a 3D model of the ostrich's leg bones and kneecaps: "We then moved the ostrich's leg, allowing us to animate the CT bone models to show how the patellae are actually moving in 3D." While this research has so far highlighted one aspect of how the sesamoid bones function, their true purpose remains a mystery. "We are still not sure why ostriches might have evolved this second kneecap," says Ms Regnault. "It might help to protect the tendon of these heavy fast-running birds, but there are other potential roles that we haven't yet explored."
A number of bingo nicknames have their origins in mid-twentieth century military slang. Number 9, Doctor's Orders, supposedly comes from the slang...
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Contents: Source Rating Date The Age A- 8/2/2000 Daily Telegraph C+ 13/7/2000 FAZ . 10/10/2007 The Guardian A- 15/7/2000 16 more rows
Read More »Patella baja, also known as patella infera, is an abnormally low lying patella, which is associated with restricted range of motion, crepitations, and retropatellar pain. If longstanding, extensor dysfunction may ensue with significant morbidity.
CUH-10 CUH-10 is the original launch console, featuring 500GB of storage space. Jul 15, 2021
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The best day to shop if you want to save money While some stores follow different schedules, the bulk of grocery stores begin their weekly specials...
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They express and build trust and hence are good communicators. Moms encourage their sons to express their feelings and are quite patient to them....
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The average American woman 20 years old and up weighs 170.6 pounds and stands at 63.7 inches (almost 5 feet, 4 inches) tall. And the average waist...
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